Ignore:
Timestamp:
18/02/12 10:29:16 (10 years ago)
Author:
fielding@…
Message:

Move definitions of Transfer-Encoding and Content-Length to where
they are first used. Move other transfer encoding stuff (codings,
TE, and Trailers) to its own section. Moved text is unchanged.
Make Upgrade use protocol tokens instead of product tokens (WTF?)
and move product tokens to p2. Reduce protocol registry requirements.
Removed now-empty section on protocol parameters.

File:
1 edited

Legend:

Unmodified
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  • draft-ietf-httpbis/latest/p2-semantics.html

    r1536 r1538  
    460460  }
    461461  @bottom-center {
    462        content: "Expires August 19, 2012";
     462       content: "Expires August 21, 2012";
    463463  }
    464464  @bottom-right {
    … …  
    490490      <link rel="Chapter" title="7 Status Code Definitions" href="#rfc.section.7">
    491491      <link rel="Chapter" title="8 Date/Time Formats" href="#rfc.section.8">
    492       <link rel="Chapter" title="9 Header Field Definitions" href="#rfc.section.9">
    493       <link rel="Chapter" title="10 IANA Considerations" href="#rfc.section.10">
    494       <link rel="Chapter" title="11 Security Considerations" href="#rfc.section.11">
    495       <link rel="Chapter" title="12 Acknowledgments" href="#rfc.section.12">
    496       <link rel="Chapter" href="#rfc.section.13" title="13 References">
     492      <link rel="Chapter" title="9 Product Tokens" href="#rfc.section.9">
     493      <link rel="Chapter" title="10 Header Field Definitions" href="#rfc.section.10">
     494      <link rel="Chapter" title="11 IANA Considerations" href="#rfc.section.11">
     495      <link rel="Chapter" title="12 Security Considerations" href="#rfc.section.12">
     496      <link rel="Chapter" title="13 Acknowledgments" href="#rfc.section.13">
     497      <link rel="Chapter" href="#rfc.section.14" title="14 References">
    497498      <link rel="Appendix" title="A Changes from RFC 2616" href="#rfc.section.A">
    498499      <link rel="Appendix" title="B Collected ABNF" href="#rfc.section.B">
    … …  
    512513      <meta name="dct.creator" content="Reschke, J. F.">
    513514      <meta name="dct.identifier" content="urn:ietf:id:draft-ietf-httpbis-p2-semantics-latest">
    514       <meta name="dct.issued" scheme="ISO8601" content="2012-02-16">
     515      <meta name="dct.issued" scheme="ISO8601" content="2012-02-18">
    515516      <meta name="dct.replaces" content="urn:ietf:rfc:2616">
    516517      <meta name="dct.abstract" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypertext information systems. HTTP has been in use by the World Wide Web global information initiative since 1990. This document is Part 2 of the seven-part specification that defines the protocol referred to as &#34;HTTP/1.1&#34; and, taken together, obsoletes RFC 2616. Part 2 defines the semantics of HTTP messages as expressed by request methods, request header fields, response status codes, and response header fields.">
    … …  
    543544            </tr>
    544545            <tr>
    545                <td class="left">Expires: August 19, 2012</td>
     546               <td class="left">Expires: August 21, 2012</td>
    546547               <td class="right">HP</td>
    547548            </tr>
    … …  
    596597            <tr>
    597598               <td class="left"></td>
    598                <td class="right">February 16, 2012</td>
     599               <td class="right">February 18, 2012</td>
    599600            </tr>
    600601         </tbody>
    … …  
    626627         in progress”.
    627628      </p>
    628       <p>This Internet-Draft will expire on August 19, 2012.</p>
     629      <p>This Internet-Draft will expire on August 21, 2012.</p>
    629630      <h1><a id="rfc.copyrightnotice" href="#rfc.copyrightnotice">Copyright Notice</a></h1>
    630631      <p>Copyright © 2012 IETF Trust and the persons identified as the document authors. All rights reserved.</p>
    … …  
    753754         </li>
    754755         <li>8.&nbsp;&nbsp;&nbsp;<a href="#http.date">Date/Time Formats</a></li>
    755          <li>9.&nbsp;&nbsp;&nbsp;<a href="#header.field.definitions">Header Field Definitions</a><ul>
    756                <li>9.1&nbsp;&nbsp;&nbsp;<a href="#header.allow">Allow</a></li>
    757                <li>9.2&nbsp;&nbsp;&nbsp;<a href="#header.date">Date</a></li>
    758                <li>9.3&nbsp;&nbsp;&nbsp;<a href="#header.expect">Expect</a></li>
    759                <li>9.4&nbsp;&nbsp;&nbsp;<a href="#header.from">From</a></li>
    760                <li>9.5&nbsp;&nbsp;&nbsp;<a href="#header.location">Location</a></li>
    761                <li>9.6&nbsp;&nbsp;&nbsp;<a href="#header.max-forwards">Max-Forwards</a></li>
    762                <li>9.7&nbsp;&nbsp;&nbsp;<a href="#header.referer">Referer</a></li>
    763                <li>9.8&nbsp;&nbsp;&nbsp;<a href="#header.retry-after">Retry-After</a></li>
    764                <li>9.9&nbsp;&nbsp;&nbsp;<a href="#header.server">Server</a></li>
    765                <li>9.10&nbsp;&nbsp;&nbsp;<a href="#header.user-agent">User-Agent</a></li>
     756         <li>9.&nbsp;&nbsp;&nbsp;<a href="#product.tokens">Product Tokens</a></li>
     757         <li>10.&nbsp;&nbsp;&nbsp;<a href="#header.field.definitions">Header Field Definitions</a><ul>
     758               <li>10.1&nbsp;&nbsp;&nbsp;<a href="#header.allow">Allow</a></li>
     759               <li>10.2&nbsp;&nbsp;&nbsp;<a href="#header.date">Date</a></li>
     760               <li>10.3&nbsp;&nbsp;&nbsp;<a href="#header.expect">Expect</a></li>
     761               <li>10.4&nbsp;&nbsp;&nbsp;<a href="#header.from">From</a></li>
     762               <li>10.5&nbsp;&nbsp;&nbsp;<a href="#header.location">Location</a></li>
     763               <li>10.6&nbsp;&nbsp;&nbsp;<a href="#header.max-forwards">Max-Forwards</a></li>
     764               <li>10.7&nbsp;&nbsp;&nbsp;<a href="#header.referer">Referer</a></li>
     765               <li>10.8&nbsp;&nbsp;&nbsp;<a href="#header.retry-after">Retry-After</a></li>
     766               <li>10.9&nbsp;&nbsp;&nbsp;<a href="#header.server">Server</a></li>
     767               <li>10.10&nbsp;&nbsp;&nbsp;<a href="#header.user-agent">User-Agent</a></li>
    766768            </ul>
    767769         </li>
    768          <li>10.&nbsp;&nbsp;&nbsp;<a href="#IANA.considerations">IANA Considerations</a><ul>
    769                <li>10.1&nbsp;&nbsp;&nbsp;<a href="#method.registration">Method Registry</a></li>
    770                <li>10.2&nbsp;&nbsp;&nbsp;<a href="#status.code.registration">Status Code Registry</a></li>
    771                <li>10.3&nbsp;&nbsp;&nbsp;<a href="#header.field.registration">Header Field Registration</a></li>
     770         <li>11.&nbsp;&nbsp;&nbsp;<a href="#IANA.considerations">IANA Considerations</a><ul>
     771               <li>11.1&nbsp;&nbsp;&nbsp;<a href="#method.registration">Method Registry</a></li>
     772               <li>11.2&nbsp;&nbsp;&nbsp;<a href="#status.code.registration">Status Code Registry</a></li>
     773               <li>11.3&nbsp;&nbsp;&nbsp;<a href="#header.field.registration">Header Field Registration</a></li>
    772774            </ul>
    773775         </li>
    774          <li>11.&nbsp;&nbsp;&nbsp;<a href="#security.considerations">Security Considerations</a><ul>
    775                <li>11.1&nbsp;&nbsp;&nbsp;<a href="#security.sensitive">Transfer of Sensitive Information</a></li>
    776                <li>11.2&nbsp;&nbsp;&nbsp;<a href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></li>
    777                <li>11.3&nbsp;&nbsp;&nbsp;<a href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></li>
    778                <li>11.4&nbsp;&nbsp;&nbsp;<a href="#rfc.section.11.4">Security Considerations for CONNECT</a></li>
     776         <li>12.&nbsp;&nbsp;&nbsp;<a href="#security.considerations">Security Considerations</a><ul>
     777               <li>12.1&nbsp;&nbsp;&nbsp;<a href="#security.sensitive">Transfer of Sensitive Information</a></li>
     778               <li>12.2&nbsp;&nbsp;&nbsp;<a href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></li>
     779               <li>12.3&nbsp;&nbsp;&nbsp;<a href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></li>
     780               <li>12.4&nbsp;&nbsp;&nbsp;<a href="#rfc.section.12.4">Security Considerations for CONNECT</a></li>
    779781            </ul>
    780782         </li>
    781          <li>12.&nbsp;&nbsp;&nbsp;<a href="#acks">Acknowledgments</a></li>
    782          <li>13.&nbsp;&nbsp;&nbsp;<a href="#rfc.references">References</a><ul>
    783                <li>13.1&nbsp;&nbsp;&nbsp;<a href="#rfc.references.1">Normative References</a></li>
    784                <li>13.2&nbsp;&nbsp;&nbsp;<a href="#rfc.references.2">Informative References</a></li>
     783         <li>13.&nbsp;&nbsp;&nbsp;<a href="#acks">Acknowledgments</a></li>
     784         <li>14.&nbsp;&nbsp;&nbsp;<a href="#rfc.references">References</a><ul>
     785               <li>14.1&nbsp;&nbsp;&nbsp;<a href="#rfc.references.1">Normative References</a></li>
     786               <li>14.2&nbsp;&nbsp;&nbsp;<a href="#rfc.references.2">Informative References</a></li>
    785787            </ul>
    786788         </li>
    … …  
    864866  <a href="#abnf.dependencies" class="smpl">comment</a>       = &lt;comment, defined in <a href="#Part1" id="rfc.xref.Part1.12"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#field.components" title="Field value components">Section 3.2.4</a>&gt;
    865867  <a href="#abnf.dependencies" class="smpl">partial-URI</a>   = &lt;partial-URI, defined in <a href="#Part1" id="rfc.xref.Part1.13"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.7</a>&gt;
    866   <a href="#abnf.dependencies" class="smpl">product</a>       = &lt;product, defined in <a href="#Part1" id="rfc.xref.Part1.14"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 5.2</a>&gt;
    867   <a href="#abnf.dependencies" class="smpl">URI-reference</a> = &lt;URI-reference, defined in <a href="#Part1" id="rfc.xref.Part1.15"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.7</a>&gt;
     868  <a href="#abnf.dependencies" class="smpl">URI-reference</a> = &lt;URI-reference, defined in <a href="#Part1" id="rfc.xref.Part1.14"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.7</a>&gt;
    868869</pre><h1 id="rfc.section.2"><a href="#rfc.section.2">2.</a>&nbsp;<a id="method" href="#method">Method</a></h1>
    869       <p id="rfc.section.2.p.1">The Method token indicates the request method to be performed on the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.16"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). The method is case-sensitive.
     870      <p id="rfc.section.2.p.1">The Method token indicates the request method to be performed on the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.15"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). The method is case-sensitive.
    870871      </p>
    871872      <div id="rfc.figure.u.3"></div><pre class="inline"><span id="rfc.iref.g.1"></span>  <a href="#method" class="smpl">Method</a>         = <a href="#core.rules" class="smpl">token</a>
    872 </pre><p id="rfc.section.2.p.3">The list of methods allowed by a resource can be specified in an Allow header field (<a href="#header.allow" id="rfc.xref.header.allow.1" title="Allow">Section&nbsp;9.1</a>). The status code of the response always notifies the client whether a method is currently allowed on a resource, since the
     873</pre><p id="rfc.section.2.p.3">The list of methods allowed by a resource can be specified in an Allow header field (<a href="#header.allow" id="rfc.xref.header.allow.1" title="Allow">Section&nbsp;10.1</a>). The status code of the response always notifies the client whether a method is currently allowed on a resource, since the
    873874         set of allowed methods can change dynamically. An origin server <em class="bcp14">SHOULD</em> respond with the status code 405 (Method Not Allowed) if the method is known by the origin server but not allowed for the
    874875         resource, and 501 (Not Implemented) if the method is unrecognized or not implemented by the origin server. The methods GET
    … …  
    946947         to a single application, so that this is clear.
    947948      </p>
    948       <p id="rfc.section.2.2.1.p.3">Due to the parsing rules defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.17"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, definitions of HTTP methods cannot prohibit the presence of a message-body on either the request or the response message
     949      <p id="rfc.section.2.2.1.p.3">Due to the parsing rules defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.16"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, definitions of HTTP methods cannot prohibit the presence of a message-body on either the request or the response message
    949950         (with responses to HEAD requests being the single exception). Definitions of new methods cannot change this rule, but they
    950951         can specify that only zero-length bodies (as opposed to absent bodies) are allowed.
    … …  
    955956      <h1 id="rfc.section.3"><a href="#rfc.section.3">3.</a>&nbsp;<a id="header.fields" href="#header.fields">Header Fields</a></h1>
    956957      <p id="rfc.section.3.p.1">Header fields are key value pairs that can be used to communicate data about the message, its payload, the target resource,
    957          or about the connection itself (i.e., control data). See <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.18"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for a general definition of their syntax.
     958         or about the connection itself (i.e., control data). See <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.17"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for a general definition of their syntax.
    958959      </p>
    959960      <h2 id="rfc.section.3.1"><a href="#rfc.section.3.1">3.1</a>&nbsp;<a id="considerations.for.creating.header.fields" href="#considerations.for.creating.header.fields">Considerations for Creating Header Fields</a></h2>
    … …  
    963964         with "X-" if they are to be registered (either immediately or in the future).
    964965      </p>
    965       <p id="rfc.section.3.1.p.3">New header field values typically have their syntax defined using ABNF (<a href="#RFC5234" id="rfc.xref.RFC5234.3"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a>), using the extension defined in <a href="p1-messaging.html#abnf.extension" title="ABNF list extension: #rule">Section 3.2.5</a> of <a href="#Part1" id="rfc.xref.Part1.19"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> as necessary, and are usually constrained to the range of ASCII characters. Header fields needing a greater range of characters
     966      <p id="rfc.section.3.1.p.3">New header field values typically have their syntax defined using ABNF (<a href="#RFC5234" id="rfc.xref.RFC5234.3"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a>), using the extension defined in <a href="p1-messaging.html#abnf.extension" title="ABNF list extension: #rule">Section 3.2.5</a> of <a href="#Part1" id="rfc.xref.Part1.18"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> as necessary, and are usually constrained to the range of ASCII characters. Header fields needing a greater range of characters
    966967         can use an encoding such as the one defined in <a href="#RFC5987" id="rfc.xref.RFC5987.1"><cite title="Character Set and Language Encoding for Hypertext Transfer Protocol (HTTP) Header Field Parameters">[RFC5987]</cite></a>.
    967968      </p>
    968969      <p id="rfc.section.3.1.p.4">Because commas (",") are used as a generic delimiter between field-values, they need to be treated with care if they are allowed
    969970         in the field-value's payload. Typically, components that might contain a comma are protected with double-quotes using the
    970          quoted-string ABNF production (<a href="p1-messaging.html#field.components" title="Field value components">Section 3.2.4</a> of <a href="#Part1" id="rfc.xref.Part1.20"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     971         quoted-string ABNF production (<a href="p1-messaging.html#field.components" title="Field value components">Section 3.2.4</a> of <a href="#Part1" id="rfc.xref.Part1.19"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    971972      </p>
    972973      <p id="rfc.section.3.1.p.5">For example, a textual date and a URI (either of which might contain a comma) could be safely carried in field-values like
    … …  
    986987      <ul>
    987988         <li>
    988             <p>Whether the field is a single value, or whether it can be a list (delimited by commas; see <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.21"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     989            <p>Whether the field is a single value, or whether it can be a list (delimited by commas; see <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.20"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    989990            </p>
    990991            <p>If it does not use the list syntax, document how to treat messages where the header field occurs multiple times (a sensible
    … …  
    10021003         </li>
    10031004         <li>
    1004             <p>Whether it is appropriate to list the field-name in the Connection header (i.e., if the header is to be hop-by-hop, see <a href="p1-messaging.html#header.connection" title="Connection">Section 8.1</a> of <a href="#Part1" id="rfc.xref.Part1.22"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     1005            <p>Whether it is appropriate to list the field-name in the Connection header (i.e., if the header is to be hop-by-hop, see <a href="p1-messaging.html#header.connection" title="Connection">Section 9.1</a> of <a href="#Part1" id="rfc.xref.Part1.21"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    10051006            </p>
    10061007         </li>
    … …  
    10131014         </li>
    10141015         <li>
    1015             <p>Whether the header field is useful or allowable in trailers (see <a href="p1-messaging.html#chunked.encoding" title="Chunked Transfer Coding">Section 5.1.1</a> of <a href="#Part1" id="rfc.xref.Part1.23"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     1016            <p>Whether the header field is useful or allowable in trailers (see <a href="p1-messaging.html#chunked.encoding" title="Chunked Transfer Coding">Section 5.1</a> of <a href="#Part1" id="rfc.xref.Part1.22"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    10161017            </p>
    10171018         </li>
    … …  
    10561057               <tr>
    10571058                  <td class="left">Expect</td>
    1058                   <td class="left"><a href="#header.expect" id="rfc.xref.header.expect.1" title="Expect">Section&nbsp;9.3</a></td>
     1059                  <td class="left"><a href="#header.expect" id="rfc.xref.header.expect.1" title="Expect">Section&nbsp;10.3</a></td>
    10591060               </tr>
    10601061               <tr>
    10611062                  <td class="left">From</td>
    1062                   <td class="left"><a href="#header.from" id="rfc.xref.header.from.1" title="From">Section&nbsp;9.4</a></td>
     1063                  <td class="left"><a href="#header.from" id="rfc.xref.header.from.1" title="From">Section&nbsp;10.4</a></td>
    10631064               </tr>
    10641065               <tr>
    10651066                  <td class="left">Host</td>
    1066                   <td class="left"><a href="p1-messaging.html#header.host" title="Host">Section 8.3</a> of <a href="#Part1" id="rfc.xref.Part1.24"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
     1067                  <td class="left"><a href="p1-messaging.html#header.host" title="Host">Section 9.2</a> of <a href="#Part1" id="rfc.xref.Part1.23"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
    10671068               </tr>
    10681069               <tr>
    … …  
    10881089               <tr>
    10891090                  <td class="left">Max-Forwards</td>
    1090                   <td class="left"><a href="#header.max-forwards" id="rfc.xref.header.max-forwards.1" title="Max-Forwards">Section&nbsp;9.6</a></td>
     1091                  <td class="left"><a href="#header.max-forwards" id="rfc.xref.header.max-forwards.1" title="Max-Forwards">Section&nbsp;10.6</a></td>
    10911092               </tr>
    10921093               <tr>
    … …  
    11001101               <tr>
    11011102                  <td class="left">Referer</td>
    1102                   <td class="left"><a href="#header.referer" id="rfc.xref.header.referer.1" title="Referer">Section&nbsp;9.7</a></td>
     1103                  <td class="left"><a href="#header.referer" id="rfc.xref.header.referer.1" title="Referer">Section&nbsp;10.7</a></td>
    11031104               </tr>
    11041105               <tr>
    11051106                  <td class="left">TE</td>
    1106                   <td class="left"><a href="p1-messaging.html#header.te" title="TE">Section 8.4</a> of <a href="#Part1" id="rfc.xref.Part1.25"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
     1107                  <td class="left"><a href="p1-messaging.html#header.te" title="TE">Section 5.4</a> of <a href="#Part1" id="rfc.xref.Part1.24"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
    11071108               </tr>
    11081109               <tr>
    11091110                  <td class="left">User-Agent</td>
    1110                   <td class="left"><a href="#header.user-agent" id="rfc.xref.header.user-agent.1" title="User-Agent">Section&nbsp;9.10</a></td>
     1111                  <td class="left"><a href="#header.user-agent" id="rfc.xref.header.user-agent.1" title="User-Agent">Section&nbsp;10.10</a></td>
    11111112               </tr>
    11121113            </tbody>
    … …  
    11151116      <h2 id="rfc.section.3.3"><a href="#rfc.section.3.3">3.3</a>&nbsp;<a id="response.header.fields" href="#response.header.fields">Response Header Fields</a></h2>
    11161117      <p id="rfc.section.3.3.p.1">The response header fields allow the server to pass additional information about the response which cannot be placed in the
    1117          Status-Line. These header fields give information about the server and about further access to the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.26"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     1118         Status-Line. These header fields give information about the server and about further access to the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.25"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    11181119      </p>
    11191120      <div id="rfc.table.u.3">
    … …  
    11361137               <tr>
    11371138                  <td class="left">Allow</td>
    1138                   <td class="left"><a href="#header.allow" id="rfc.xref.header.allow.2" title="Allow">Section&nbsp;9.1</a></td>
     1139                  <td class="left"><a href="#header.allow" id="rfc.xref.header.allow.2" title="Allow">Section&nbsp;10.1</a></td>
    11391140               </tr>
    11401141               <tr>
    11411142                  <td class="left">Date</td>
    1142                   <td class="left"><a href="#header.date" id="rfc.xref.header.date.1" title="Date">Section&nbsp;9.2</a></td>
     1143                  <td class="left"><a href="#header.date" id="rfc.xref.header.date.1" title="Date">Section&nbsp;10.2</a></td>
    11431144               </tr>
    11441145               <tr>
    … …  
    11481149               <tr>
    11491150                  <td class="left">Location</td>
    1150                   <td class="left"><a href="#header.location" id="rfc.xref.header.location.1" title="Location">Section&nbsp;9.5</a></td>
     1151                  <td class="left"><a href="#header.location" id="rfc.xref.header.location.1" title="Location">Section&nbsp;10.5</a></td>
    11511152               </tr>
    11521153               <tr>
    … …  
    11561157               <tr>
    11571158                  <td class="left">Retry-After</td>
    1158                   <td class="left"><a href="#header.retry-after" id="rfc.xref.header.retry-after.1" title="Retry-After">Section&nbsp;9.8</a></td>
     1159                  <td class="left"><a href="#header.retry-after" id="rfc.xref.header.retry-after.1" title="Retry-After">Section&nbsp;10.8</a></td>
    11591160               </tr>
    11601161               <tr>
    11611162                  <td class="left">Server</td>
    1162                   <td class="left"><a href="#header.server" id="rfc.xref.header.server.1" title="Server">Section&nbsp;9.9</a></td>
     1163                  <td class="left"><a href="#header.server" id="rfc.xref.header.server.1" title="Server">Section&nbsp;10.9</a></td>
    11631164               </tr>
    11641165               <tr>
    … …  
    14371438         in an HTTP message, it is referred to as the payload of the message. HTTP representations are defined in <a href="#Part3" id="rfc.xref.Part3.7"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>.
    14381439      </p>
    1439       <p id="rfc.section.5.p.2">A representation body is only present in a message when a message-body is present, as described in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.27"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. The representation body is obtained from the message-body by decoding any Transfer-Encoding that might have been applied
     1440      <p id="rfc.section.5.p.2">A representation body is only present in a message when a message-body is present, as described in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.26"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. The representation body is obtained from the message-body by decoding any Transfer-Encoding that might have been applied
    14401441         to ensure safe and proper transfer of the message.
    14411442      </p>
    … …  
    14431444      <p id="rfc.section.5.1.p.1">It is sometimes necessary to determine an identifier for the resource associated with a representation.</p>
    14441445      <p id="rfc.section.5.1.p.2">An HTTP request representation, when present, is always associated with an anonymous (i.e., unidentified) resource.</p>
    1445       <p id="rfc.section.5.1.p.3">In the common case, an HTTP response is a representation of the target resource (see <a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.28"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). However, this is not always the case. To determine the URI of the resource a response is associated with, the following
     1446      <p id="rfc.section.5.1.p.3">In the common case, an HTTP response is a representation of the target resource (see <a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.27"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). However, this is not always the case. To determine the URI of the resource a response is associated with, the following
    14461447         rules are used (with the first applicable one being selected):
    14471448      </p>
    … …  
    15131514         but might be defined by future extensions to HTTP. Content negotiation <em class="bcp14">MAY</em> be used to select the appropriate response format. If no response body is included, the response <em class="bcp14">MUST</em> include a Content-Length field with a field-value of "0".
    15141515      </p>
    1515       <p id="rfc.section.6.2.p.7">The Max-Forwards header field <em class="bcp14">MAY</em> be used to target a specific proxy in the request chain (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.2" title="Max-Forwards">Section&nbsp;9.6</a>). If no Max-Forwards field is present in the request, then the forwarded request <em class="bcp14">MUST NOT</em> include a Max-Forwards field.
     1516      <p id="rfc.section.6.2.p.7">The Max-Forwards header field <em class="bcp14">MAY</em> be used to target a specific proxy in the request chain (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.2" title="Max-Forwards">Section&nbsp;10.6</a>). If no Max-Forwards field is present in the request, then the forwarded request <em class="bcp14">MUST NOT</em> include a Max-Forwards field.
    15161517      </p>
    15171518      <h2 id="rfc.section.6.3"><a href="#rfc.section.6.3">6.3</a>&nbsp;<a id="GET" href="#GET">GET</a></h2>
    … …  
    15371538      <p id="rfc.section.6.3.p.6">The response to a GET request is cacheable and <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests (see <a href="#Part6" id="rfc.xref.Part6.6"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    15381539      </p>
    1539       <p id="rfc.section.6.3.p.7">See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;11.2</a> for security considerations when used for forms.
     1540      <p id="rfc.section.6.3.p.7">See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;12.2</a> for security considerations when used for forms.
    15401541      </p>
    15411542      <h2 id="rfc.section.6.4"><a href="#rfc.section.6.4">6.4</a>&nbsp;<a id="HEAD" href="#HEAD">HEAD</a></h2>
    … …  
    15731574      </p>
    15741575      <p id="rfc.section.6.5.p.4">If a resource has been created on the origin server, the response <em class="bcp14">SHOULD</em> be 201 (Created) and contain a representation which describes the status of the request and refers to the new resource, and
    1575          a Location header field (see <a href="#header.location" id="rfc.xref.header.location.2" title="Location">Section&nbsp;9.5</a>).
     1576         a Location header field (see <a href="#header.location" id="rfc.xref.header.location.2" title="Location">Section&nbsp;10.5</a>).
    15761577      </p>
    15771578      <p id="rfc.section.6.5.p.5">Responses to POST requests are only cacheable when they include explicit freshness information (see <a href="p6-cache.html#calculating.freshness.lifetime" title="Calculating Freshness Lifetime">Section 2.3.1</a> of <a href="#Part6" id="rfc.xref.Part6.8"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>). A cached POST response with a Content-Location header field (see <a href="p3-payload.html#header.content-location" title="Content-Location">Section 6.7</a> of <a href="#Part3" id="rfc.xref.Part3.8"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) whose value is the effective Request URI <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests.
    … …  
    16631664      <div id="rfc.iref.m.7"></div>
    16641665      <p id="rfc.section.6.8.p.1">The TRACE method requests a remote, application-layer loop-back of the request message. The final recipient of the request <em class="bcp14">SHOULD</em> reflect the message received back to the client as the message-body of a 200 (OK) response. The final recipient is either
    1665          the origin server or the first proxy to receive a Max-Forwards value of zero (0) in the request (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.3" title="Max-Forwards">Section&nbsp;9.6</a>). A TRACE request <em class="bcp14">MUST NOT</em> include a message-body.
     1666         the origin server or the first proxy to receive a Max-Forwards value of zero (0) in the request (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.3" title="Max-Forwards">Section&nbsp;10.6</a>). A TRACE request <em class="bcp14">MUST NOT</em> include a message-body.
    16661667      </p>
    16671668      <p id="rfc.section.6.8.p.2">TRACE allows the client to see what is being received at the other end of the request chain and use that data for testing
    1668          or diagnostic information. The value of the Via header field (<a href="p1-messaging.html#header.via" title="Via">Section 8.8</a> of <a href="#Part1" id="rfc.xref.Part1.29"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) is of particular interest, since it acts as a trace of the request chain. Use of the Max-Forwards header field allows the
     1669         or diagnostic information. The value of the Via header field (<a href="p1-messaging.html#header.via" title="Via">Section 9.4</a> of <a href="#Part1" id="rfc.xref.Part1.28"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) is of particular interest, since it acts as a trace of the request chain. Use of the Max-Forwards header field allows the
    16691670         client to limit the length of the request chain, which is useful for testing a chain of proxies forwarding messages in an
    16701671         infinite loop.
    16711672      </p>
    1672       <p id="rfc.section.6.8.p.3">If the request is valid, the response <em class="bcp14">SHOULD</em> have a Content-Type of "message/http" (see <a href="p1-messaging.html#internet.media.type.message.http" title="Internet Media Type message/http">Section 9.3.1</a> of <a href="#Part1" id="rfc.xref.Part1.30"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and contain a message-body that encloses a copy of the entire request message. Responses to the TRACE method are not cacheable.
     1673      <p id="rfc.section.6.8.p.3">If the request is valid, the response <em class="bcp14">SHOULD</em> have a Content-Type of "message/http" (see <a href="p1-messaging.html#internet.media.type.message.http" title="Internet Media Type message/http">Section 10.3.1</a> of <a href="#Part1" id="rfc.xref.Part1.29"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and contain a message-body that encloses a copy of the entire request message. Responses to the TRACE method are not cacheable.
    16731674      </p>
    16741675      <div id="rfc.iref.c.1"></div>
    … …  
    16781679         forwarding of packets until the connection is closed.
    16791680      </p>
    1680       <p id="rfc.section.6.9.p.2">When using CONNECT, the request-target <em class="bcp14">MUST</em> use the authority form (<a href="p1-messaging.html#request-target" title="request-target">Section 3.1.1.2</a> of <a href="#Part1" id="rfc.xref.Part1.31"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>); i.e., the request-target consists of only the host name and port number of the tunnel destination, separated by a colon.
     1681      <p id="rfc.section.6.9.p.2">When using CONNECT, the request-target <em class="bcp14">MUST</em> use the authority form (<a href="p1-messaging.html#request-target" title="request-target">Section 3.1.1.2</a> of <a href="#Part1" id="rfc.xref.Part1.30"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>); i.e., the request-target consists of only the host name and port number of the tunnel destination, separated by a colon.
    16811682         For example,
    16821683      </p>
    … …  
    17451746      <p id="rfc.section.7.1.1.p.1">The client <em class="bcp14">SHOULD</em> continue with its request. This interim response is used to inform the client that the initial part of the request has been
    17461747         received and has not yet been rejected by the server. The client <em class="bcp14">SHOULD</em> continue by sending the remainder of the request or, if the request has already been completed, ignore this response. The
    1747          server <em class="bcp14">MUST</em> send a final response after the request has been completed. See <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 6.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.32"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for detailed discussion of the use and handling of this status code.
     1748         server <em class="bcp14">MUST</em> send a final response after the request has been completed. See <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 7.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.31"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for detailed discussion of the use and handling of this status code.
    17481749      </p>
    17491750      <div id="rfc.iref.23"></div>
    17501751      <div id="rfc.iref.s.3"></div>
    17511752      <h3 id="rfc.section.7.1.2"><a href="#rfc.section.7.1.2">7.1.2</a>&nbsp;<a id="status.101" href="#status.101">101 Switching Protocols</a></h3>
    1752       <p id="rfc.section.7.1.2.p.1">The server understands and is willing to comply with the client's request, via the Upgrade message header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 8.7</a> of <a href="#Part1" id="rfc.xref.Part1.33"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>), for a change in the application protocol being used on this connection. The server will switch protocols to those defined
     1753      <p id="rfc.section.7.1.2.p.1">The server understands and is willing to comply with the client's request, via the Upgrade message header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 9.3</a> of <a href="#Part1" id="rfc.xref.Part1.32"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>), for a change in the application protocol being used on this connection. The server will switch protocols to those defined
    17531754         by the response's Upgrade header field immediately after the empty line which terminates the 101 response.
    17541755      </p>
    … …  
    18031804      <div id="rfc.iref.s.7"></div>
    18041805      <h3 id="rfc.section.7.2.4"><a href="#rfc.section.7.2.4">7.2.4</a>&nbsp;<a id="status.203" href="#status.203">203 Non-Authoritative Information</a></h3>
    1805       <p id="rfc.section.7.2.4.p.1">The representation in the response has been transformed or otherwise modified by a transforming proxy (<a href="p1-messaging.html#intermediaries" title="Intermediaries">Section 2.3</a> of <a href="#Part1" id="rfc.xref.Part1.34"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). Note that the behavior of transforming intermediaries is controlled by the no-transform Cache-Control directive (<a href="p6-cache.html#header.cache-control" title="Cache-Control">Section 3.2</a> of <a href="#Part6" id="rfc.xref.Part6.12"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
     1806      <p id="rfc.section.7.2.4.p.1">The representation in the response has been transformed or otherwise modified by a transforming proxy (<a href="p1-messaging.html#intermediaries" title="Intermediaries">Section 2.3</a> of <a href="#Part1" id="rfc.xref.Part1.33"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). Note that the behavior of transforming intermediaries is controlled by the no-transform Cache-Control directive (<a href="p6-cache.html#header.cache-control" title="Cache-Control">Section 3.2</a> of <a href="#Part6" id="rfc.xref.Part6.12"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    18061807      </p>
    18071808      <p id="rfc.section.7.2.4.p.2">This status code is only appropriate when the response status code would have been 200 (OK) otherwise. When the status code
    … …  
    18381839         another input action.
    18391840      </p>
    1840       <p id="rfc.section.7.2.6.p.2">The message-body included with the response <em class="bcp14">MUST</em> be empty. Note that receivers still need to parse the response according to the algorithm defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.35"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
     1841      <p id="rfc.section.7.2.6.p.2">The message-body included with the response <em class="bcp14">MUST</em> be empty. Note that receivers still need to parse the response according to the algorithm defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.34"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
    18411842      </p>
    18421843      <h2 id="rfc.section.7.3"><a href="#rfc.section.7.3">7.3</a>&nbsp;<a id="status.3xx" href="#status.3xx">Redirection 3xx</a></h2>
    … …  
    18761877         </p>
    18771878      </div>
    1878       <p id="rfc.section.7.3.p.4">A Location header field on a 3xx response indicates that a client <em class="bcp14">MAY</em> automatically redirect to the URI provided; see <a href="#header.location" id="rfc.xref.header.location.3" title="Location">Section&nbsp;9.5</a>.
     1879      <p id="rfc.section.7.3.p.4">A Location header field on a 3xx response indicates that a client <em class="bcp14">MAY</em> automatically redirect to the URI provided; see <a href="#header.location" id="rfc.xref.header.location.3" title="Location">Section&nbsp;10.5</a>.
    18791880      </p>
    18801881      <p id="rfc.section.7.3.p.5">Note that for methods not known to be "safe", as defined in <a href="#safe.methods" title="Safe Methods">Section&nbsp;6.1.1</a>, automatic redirection needs to done with care, since the redirect might change the conditions under which the request was
    … …  
    20922093      <div id="rfc.iref.s.30"></div>
    20932094      <h3 id="rfc.section.7.4.14"><a href="#rfc.section.7.4.14">7.4.14</a>&nbsp;<a id="status.417" href="#status.417">417 Expectation Failed</a></h3>
    2094       <p id="rfc.section.7.4.14.p.1">The expectation given in an Expect header field (see <a href="#header.expect" id="rfc.xref.header.expect.2" title="Expect">Section&nbsp;9.3</a>) could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could
     2095      <p id="rfc.section.7.4.14.p.1">The expectation given in an Expect header field (see <a href="#header.expect" id="rfc.xref.header.expect.2" title="Expect">Section&nbsp;10.3</a>) could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could
    20952096         not be met by the next-hop server.
    20962097      </p>
    … …  
    20982099      <div id="rfc.iref.s.31"></div>
    20992100      <h3 id="rfc.section.7.4.15"><a href="#rfc.section.7.4.15">7.4.15</a>&nbsp;<a id="status.426" href="#status.426">426 Upgrade Required</a></h3>
    2100       <p id="rfc.section.7.4.15.p.1">The request can not be completed without a prior protocol upgrade. This response <em class="bcp14">MUST</em> include an Upgrade header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 8.7</a> of <a href="#Part1" id="rfc.xref.Part1.36"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) specifying the required protocols.
     2101      <p id="rfc.section.7.4.15.p.1">The request can not be completed without a prior protocol upgrade. This response <em class="bcp14">MUST</em> include an Upgrade header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 9.3</a> of <a href="#Part1" id="rfc.xref.Part1.35"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) specifying the required protocols.
    21012102      </p>
    21022103      <div id="rfc.figure.u.8"></div>
    … …  
    21372138      <p id="rfc.section.7.5.4.p.1">The server is currently unable to handle the request due to a temporary overloading or maintenance of the server.</p>
    21382139      <p id="rfc.section.7.5.4.p.2">The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the
    2139          delay <em class="bcp14">MAY</em> be indicated in a Retry-After header field (<a href="#header.retry-after" id="rfc.xref.header.retry-after.2" title="Retry-After">Section&nbsp;9.8</a>). If no Retry-After is given, the client <em class="bcp14">SHOULD</em> handle the response as it would for a 500 response.
     2140         delay <em class="bcp14">MAY</em> be indicated in a Retry-After header field (<a href="#header.retry-after" id="rfc.xref.header.retry-after.2" title="Retry-After">Section&nbsp;10.8</a>). If no Retry-After is given, the client <em class="bcp14">SHOULD</em> handle the response as it would for a 500 response.
    21402141      </p>
    21412142      <div class="note" id="rfc.section.7.5.4.p.3">
    … …  
    21592160      <p id="rfc.section.7.5.6.p.1">The server does not support, or refuses to support, the protocol version that was used in the request message. The server
    21602161         is indicating that it is unable or unwilling to complete the request using the same major version as the client, as described
    2161          in <a href="p1-messaging.html#http.version" title="Protocol Versioning">Section 2.6</a> of <a href="#Part1" id="rfc.xref.Part1.37"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, other than with this error message. The response <em class="bcp14">SHOULD</em> contain a representation describing why that version is not supported and what other protocols are supported by that server.
     2162         in <a href="p1-messaging.html#http.version" title="Protocol Versioning">Section 2.6</a> of <a href="#Part1" id="rfc.xref.Part1.36"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, other than with this error message. The response <em class="bcp14">SHOULD</em> contain a representation describing why that version is not supported and what other protocols are supported by that server.
    21622163      </p>
    21632164      <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a>&nbsp;<a id="http.date" href="#http.date">Date/Time Formats</a></h1>
    … …  
    22472248         </p>
    22482249      </div>
    2249       <h1 id="rfc.section.9"><a href="#rfc.section.9">9.</a>&nbsp;<a id="header.field.definitions" href="#header.field.definitions">Header Field Definitions</a></h1>
    2250       <p id="rfc.section.9.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to request and response semantics.</p>
     2250      <h1 id="rfc.section.9"><a href="#rfc.section.9">9.</a>&nbsp;<a id="product.tokens" href="#product.tokens">Product Tokens</a></h1>
     2251      <p id="rfc.section.9.p.1">Product tokens are used to allow communicating applications to identify themselves by software name and version. Most fields
     2252         using product tokens also allow sub-products which form a significant part of the application to be listed, separated by whitespace.
     2253         By convention, the products are listed in order of their significance for identifying the application.
     2254      </p>
     2255      <div id="rfc.figure.u.16"></div><pre class="inline"><span id="rfc.iref.g.22"></span><span id="rfc.iref.g.23"></span>  <a href="#product.tokens" class="smpl">product</a>         = <a href="#core.rules" class="smpl">token</a> ["/" <a href="#product.tokens" class="smpl">product-version</a>]
     2256  <a href="#product.tokens" class="smpl">product-version</a> = <a href="#core.rules" class="smpl">token</a>
     2257</pre><p id="rfc.section.9.p.3">Examples:</p>
     2258      <div id="rfc.figure.u.17"></div><pre class="text">  User-Agent: CERN-LineMode/2.15 libwww/2.17b3
     2259  Server: Apache/0.8.4
     2260</pre><p id="rfc.section.9.p.5">Product tokens <em class="bcp14">SHOULD</em> be short and to the point. They <em class="bcp14">MUST NOT</em> be used for advertising or other non-essential information. Although any token octet <em class="bcp14">MAY</em> appear in a product-version, this token <em class="bcp14">SHOULD</em> only be used for a version identifier (i.e., successive versions of the same product <em class="bcp14">SHOULD</em> only differ in the product-version portion of the product value).
     2261      </p>
     2262      <h1 id="rfc.section.10"><a href="#rfc.section.10">10.</a>&nbsp;<a id="header.field.definitions" href="#header.field.definitions">Header Field Definitions</a></h1>
     2263      <p id="rfc.section.10.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to request and response semantics.</p>
    22512264      <div id="rfc.iref.a.1"></div>
    22522265      <div id="rfc.iref.h.2"></div>
    2253       <h2 id="rfc.section.9.1"><a href="#rfc.section.9.1">9.1</a>&nbsp;<a id="header.allow" href="#header.allow">Allow</a></h2>
    2254       <p id="rfc.section.9.1.p.1">The "Allow" header field lists the set of methods advertised as supported by the target resource. The purpose of this field
     2266      <h2 id="rfc.section.10.1"><a href="#rfc.section.10.1">10.1</a>&nbsp;<a id="header.allow" href="#header.allow">Allow</a></h2>
     2267      <p id="rfc.section.10.1.p.1">The "Allow" header field lists the set of methods advertised as supported by the target resource. The purpose of this field
    22552268         is strictly to inform the recipient of valid request methods associated with the resource.
    22562269      </p>
    2257       <div id="rfc.figure.u.16"></div><pre class="inline"><span id="rfc.iref.g.22"></span>  <a href="#header.allow" class="smpl">Allow</a> = #<a href="#method" class="smpl">Method</a>
    2258 </pre><p id="rfc.section.9.1.p.3">Example of use:</p>
    2259       <div id="rfc.figure.u.17"></div><pre class="text">  Allow: GET, HEAD, PUT
    2260 </pre><p id="rfc.section.9.1.p.5">The actual set of allowed methods is defined by the origin server at the time of each request.</p>
    2261       <p id="rfc.section.9.1.p.6">A proxy <em class="bcp14">MUST NOT</em> modify the Allow header field — it does not need to understand all the methods specified in order to handle them according
     2270      <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.24"></span>  <a href="#header.allow" class="smpl">Allow</a> = #<a href="#method" class="smpl">Method</a>
     2271</pre><p id="rfc.section.10.1.p.3">Example of use:</p>
     2272      <div id="rfc.figure.u.19"></div><pre class="text">  Allow: GET, HEAD, PUT
     2273</pre><p id="rfc.section.10.1.p.5">The actual set of allowed methods is defined by the origin server at the time of each request.</p>
     2274      <p id="rfc.section.10.1.p.6">A proxy <em class="bcp14">MUST NOT</em> modify the Allow header field — it does not need to understand all the methods specified in order to handle them according
    22622275         to the generic message handling rules.
    22632276      </p>
    22642277      <div id="rfc.iref.d.2"></div>
    22652278      <div id="rfc.iref.h.3"></div>
    2266       <h2 id="rfc.section.9.2"><a href="#rfc.section.9.2">9.2</a>&nbsp;<a id="header.date" href="#header.date">Date</a></h2>
    2267       <p id="rfc.section.9.2.p.1">The "Date" header field represents the date and time at which the message was originated, having the same semantics as the
     2279      <h2 id="rfc.section.10.2"><a href="#rfc.section.10.2">10.2</a>&nbsp;<a id="header.date" href="#header.date">Date</a></h2>
     2280      <p id="rfc.section.10.2.p.1">The "Date" header field represents the date and time at which the message was originated, having the same semantics as the
    22682281         Origination Date Field (orig-date) defined in <a href="http://tools.ietf.org/html/rfc5322#section-3.6.1">Section 3.6.1</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.2"><cite title="Internet Message Format">[RFC5322]</cite></a>. The field value is an HTTP-date, as defined in <a href="#http.date" title="Date/Time Formats">Section&nbsp;8</a>; it <em class="bcp14">MUST</em> be sent in rfc1123-date format.
    22692282      </p>
    2270       <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.23"></span>  <a href="#header.date" class="smpl">Date</a> = <a href="#http.date" class="smpl">HTTP-date</a>
    2271 </pre><p id="rfc.section.9.2.p.3">An example is</p>
    2272       <div id="rfc.figure.u.19"></div><pre class="text">  Date: Tue, 15 Nov 1994 08:12:31 GMT
    2273 </pre><p id="rfc.section.9.2.p.5">Origin servers <em class="bcp14">MUST</em> include a Date header field in all responses, except in these cases:
     2283      <div id="rfc.figure.u.20"></div><pre class="inline"><span id="rfc.iref.g.25"></span>  <a href="#header.date" class="smpl">Date</a> = <a href="#http.date" class="smpl">HTTP-date</a>
     2284</pre><p id="rfc.section.10.2.p.3">An example is</p>
     2285      <div id="rfc.figure.u.21"></div><pre class="text">  Date: Tue, 15 Nov 1994 08:12:31 GMT
     2286</pre><p id="rfc.section.10.2.p.5">Origin servers <em class="bcp14">MUST</em> include a Date header field in all responses, except in these cases:
    22742287      </p>
    22752288      <ol>
    … …  
    22822295         </li>
    22832296      </ol>
    2284       <p id="rfc.section.9.2.p.6">A received message that does not have a Date header field <em class="bcp14">MUST</em> be assigned one by the recipient if the message will be cached by that recipient.
    2285       </p>
    2286       <p id="rfc.section.9.2.p.7">Clients can use the Date header field as well; in order to keep request messages small, they are advised not to include it
     2297      <p id="rfc.section.10.2.p.6">A received message that does not have a Date header field <em class="bcp14">MUST</em> be assigned one by the recipient if the message will be cached by that recipient.
     2298      </p>
     2299      <p id="rfc.section.10.2.p.7">Clients can use the Date header field as well; in order to keep request messages small, they are advised not to include it
    22872300         when it doesn't convey any useful information (as is usually the case for requests that do not contain a payload).
    22882301      </p>
    2289       <p id="rfc.section.9.2.p.8">The HTTP-date sent in a Date header field <em class="bcp14">SHOULD NOT</em> represent a date and time subsequent to the generation of the message. It <em class="bcp14">SHOULD</em> represent the best available approximation of the date and time of message generation, unless the implementation has no means
     2302      <p id="rfc.section.10.2.p.8">The HTTP-date sent in a Date header field <em class="bcp14">SHOULD NOT</em> represent a date and time subsequent to the generation of the message. It <em class="bcp14">SHOULD</em> represent the best available approximation of the date and time of message generation, unless the implementation has no means
    22902303         of generating a reasonably accurate date and time. In theory, the date ought to represent the moment just before the payload
    22912304         is generated. In practice, the date can be generated at any time during the message origination without affecting its semantic
    … …  
    22942307      <div id="rfc.iref.e.1"></div>
    22952308      <div id="rfc.iref.h.4"></div>
    2296       <h2 id="rfc.section.9.3"><a href="#rfc.section.9.3">9.3</a>&nbsp;<a id="header.expect" href="#header.expect">Expect</a></h2>
    2297       <p id="rfc.section.9.3.p.1">The "Expect" header field is used to indicate that particular server behaviors are required by the client.</p>
    2298       <div id="rfc.figure.u.20"></div><pre class="inline"><span id="rfc.iref.g.24"></span><span id="rfc.iref.g.25"></span><span id="rfc.iref.g.26"></span><span id="rfc.iref.g.27"></span><span id="rfc.iref.g.28"></span>  <a href="#header.expect" class="smpl">Expect</a>       = 1#<a href="#header.expect" class="smpl">expectation</a>
     2309      <h2 id="rfc.section.10.3"><a href="#rfc.section.10.3">10.3</a>&nbsp;<a id="header.expect" href="#header.expect">Expect</a></h2>
     2310      <p id="rfc.section.10.3.p.1">The "Expect" header field is used to indicate that particular server behaviors are required by the client.</p>
     2311      <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.26"></span><span id="rfc.iref.g.27"></span><span id="rfc.iref.g.28"></span><span id="rfc.iref.g.29"></span><span id="rfc.iref.g.30"></span>  <a href="#header.expect" class="smpl">Expect</a>       = 1#<a href="#header.expect" class="smpl">expectation</a>
    22992312 
    23002313  <a href="#header.expect" class="smpl">expectation</a>  = <a href="#header.expect" class="smpl">expect-name</a> [ <a href="#core.rules" class="smpl">BWS</a> "=" <a href="#core.rules" class="smpl">BWS</a> <a href="#header.expect" class="smpl">expect-value</a> ]
    … …  
    23042317  <a href="#header.expect" class="smpl">expect-name</a>  = <a href="#core.rules" class="smpl">token</a>
    23052318  <a href="#header.expect" class="smpl">expect-value</a> = <a href="#core.rules" class="smpl">token</a> / <a href="#core.rules" class="smpl">quoted-string</a>
    2306 </pre><p id="rfc.section.9.3.p.3">If all received Expect header field(s) are syntactically valid but contain an expectation that the recipient does not understand
     2319</pre><p id="rfc.section.10.3.p.3">If all received Expect header field(s) are syntactically valid but contain an expectation that the recipient does not understand
    23072320         or cannot comply with, the recipient <em class="bcp14">MUST</em> respond with a 417 (Expectation Failed) status code. A recipient of a syntactically invalid Expectation header field <em class="bcp14">MUST</em> respond with a 4xx status code other than 417.
    23082321      </p>
    2309       <p id="rfc.section.9.3.p.4">The only expectation defined by this specification is:</p>
    2310       <p id="rfc.section.9.3.p.5"><span id="rfc.iref.87"></span><span id="rfc.iref.e.2"></span> 100-continue
     2322      <p id="rfc.section.10.3.p.4">The only expectation defined by this specification is:</p>
     2323      <p id="rfc.section.10.3.p.5"><span id="rfc.iref.89"></span><span id="rfc.iref.e.2"></span> 100-continue
    23112324      </p>
    23122325      <ul class="empty">
    2313          <li>The "100-continue" expectation is defined <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 6.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.38"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. It does not support any expect-params.
     2326         <li>The "100-continue" expectation is defined <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 7.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.37"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. It does not support any expect-params.
    23142327         </li>
    23152328      </ul>
    2316       <p id="rfc.section.9.3.p.6">Comparison is case-insensitive for names (expect-name), and case-sensitive for values (expect-value).</p>
    2317       <p id="rfc.section.9.3.p.7">The Expect mechanism is hop-by-hop: the above requirements apply to any server, including proxies. However, the Expect header
     2329      <p id="rfc.section.10.3.p.6">Comparison is case-insensitive for names (expect-name), and case-sensitive for values (expect-value).</p>
     2330      <p id="rfc.section.10.3.p.7">The Expect mechanism is hop-by-hop: the above requirements apply to any server, including proxies. However, the Expect header
    23182331         field itself is end-to-end; it <em class="bcp14">MUST</em> be forwarded if the request is forwarded.
    23192332      </p>
    2320       <p id="rfc.section.9.3.p.8">Many older HTTP/1.0 and HTTP/1.1 applications do not understand the Expect header field.</p>
     2333      <p id="rfc.section.10.3.p.8">Many older HTTP/1.0 and HTTP/1.1 applications do not understand the Expect header field.</p>
    23212334      <div id="rfc.iref.f.1"></div>
    23222335      <div id="rfc.iref.h.5"></div>
    2323       <h2 id="rfc.section.9.4"><a href="#rfc.section.9.4">9.4</a>&nbsp;<a id="header.from" href="#header.from">From</a></h2>
    2324       <p id="rfc.section.9.4.p.1">The "From" header field, if given, <em class="bcp14">SHOULD</em> contain an Internet e-mail address for the human user who controls the requesting user agent. The address <em class="bcp14">SHOULD</em> be machine-usable, as defined by "mailbox" in <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.3"><cite title="Internet Message Format">[RFC5322]</cite></a>:
    2325       </p>
    2326       <div id="rfc.figure.u.21"></div><pre class="inline"><span id="rfc.iref.g.29"></span>  <a href="#header.from" class="smpl">From</a>    = <a href="#header.from" class="smpl">mailbox</a>
     2336      <h2 id="rfc.section.10.4"><a href="#rfc.section.10.4">10.4</a>&nbsp;<a id="header.from" href="#header.from">From</a></h2>
     2337      <p id="rfc.section.10.4.p.1">The "From" header field, if given, <em class="bcp14">SHOULD</em> contain an Internet e-mail address for the human user who controls the requesting user agent. The address <em class="bcp14">SHOULD</em> be machine-usable, as defined by "mailbox" in <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.3"><cite title="Internet Message Format">[RFC5322]</cite></a>:
     2338      </p>
     2339      <div id="rfc.figure.u.23"></div><pre class="inline"><span id="rfc.iref.g.31"></span>  <a href="#header.from" class="smpl">From</a>    = <a href="#header.from" class="smpl">mailbox</a>
    23272340 
    23282341  <a href="#header.from" class="smpl">mailbox</a> = &lt;mailbox, defined in <a href="#RFC5322" id="rfc.xref.RFC5322.4"><cite title="Internet Message Format">[RFC5322]</cite></a>, <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a>&gt;
    2329 </pre><p id="rfc.section.9.4.p.3">An example is:</p>
    2330       <div id="rfc.figure.u.22"></div><pre class="text">  From: webmaster@example.org
    2331 </pre><p id="rfc.section.9.4.p.5">This header field <em class="bcp14">MAY</em> be used for logging purposes and as a means for identifying the source of invalid or unwanted requests. It <em class="bcp14">SHOULD NOT</em> be used as an insecure form of access protection. The interpretation of this field is that the request is being performed
     2342</pre><p id="rfc.section.10.4.p.3">An example is:</p>
     2343      <div id="rfc.figure.u.24"></div><pre class="text">  From: webmaster@example.org
     2344</pre><p id="rfc.section.10.4.p.5">This header field <em class="bcp14">MAY</em> be used for logging purposes and as a means for identifying the source of invalid or unwanted requests. It <em class="bcp14">SHOULD NOT</em> be used as an insecure form of access protection. The interpretation of this field is that the request is being performed
    23322345         on behalf of the person given, who accepts responsibility for the method performed. In particular, robot agents <em class="bcp14">SHOULD</em> include this header field so that the person responsible for running the robot can be contacted if problems occur on the receiving
    23332346         end.
    23342347      </p>
    2335       <p id="rfc.section.9.4.p.6">The Internet e-mail address in this field <em class="bcp14">MAY</em> be separate from the Internet host which issued the request. For example, when a request is passed through a proxy the original
     2348      <p id="rfc.section.10.4.p.6">The Internet e-mail address in this field <em class="bcp14">MAY</em> be separate from the Internet host which issued the request. For example, when a request is passed through a proxy the original
    23362349         issuer's address <em class="bcp14">SHOULD</em> be used.
    23372350      </p>
    2338       <p id="rfc.section.9.4.p.7">The client <em class="bcp14">SHOULD NOT</em> send the From header field without the user's approval, as it might conflict with the user's privacy interests or their site's
     2351      <p id="rfc.section.10.4.p.7">The client <em class="bcp14">SHOULD NOT</em> send the From header field without the user's approval, as it might conflict with the user's privacy interests or their site's
    23392352         security policy. It is strongly recommended that the user be able to disable, enable, and modify the value of this field at
    23402353         any time prior to a request.
    … …  
    23422355      <div id="rfc.iref.l.1"></div>
    23432356      <div id="rfc.iref.h.6"></div>
    2344       <h2 id="rfc.section.9.5"><a href="#rfc.section.9.5">9.5</a>&nbsp;<a id="header.location" href="#header.location">Location</a></h2>
    2345       <p id="rfc.section.9.5.p.1">The "Location" header field <em class="bcp14">MAY</em> be sent in responses to refer to a specific resource in accordance with the semantics of the status code.
    2346       </p>
    2347       <div id="rfc.figure.u.23"></div><pre class="inline"><span id="rfc.iref.g.30"></span>  <a href="#header.location" class="smpl">Location</a> = <a href="#abnf.dependencies" class="smpl">URI-reference</a>
    2348 </pre><p id="rfc.section.9.5.p.3">For 201 (Created) responses, the Location is the URI of the new resource which was created by the request. For 3xx responses,
     2357      <h2 id="rfc.section.10.5"><a href="#rfc.section.10.5">10.5</a>&nbsp;<a id="header.location" href="#header.location">Location</a></h2>
     2358      <p id="rfc.section.10.5.p.1">The "Location" header field <em class="bcp14">MAY</em> be sent in responses to refer to a specific resource in accordance with the semantics of the status code.
     2359      </p>
     2360      <div id="rfc.figure.u.25"></div><pre class="inline"><span id="rfc.iref.g.32"></span>  <a href="#header.location" class="smpl">Location</a> = <a href="#abnf.dependencies" class="smpl">URI-reference</a>
     2361</pre><p id="rfc.section.10.5.p.3">For 201 (Created) responses, the Location is the URI of the new resource which was created by the request. For 3xx responses,
    23492362         the location <em class="bcp14">SHOULD</em> indicate the server's preferred URI for automatic redirection to the resource.
    23502363      </p>
    2351       <p id="rfc.section.9.5.p.4">The field value consists of a single URI-reference. When it has the form of a relative reference (<a href="#RFC3986" id="rfc.xref.RFC3986.1"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-4.2">Section 4.2</a>), the final value is computed by resolving it against the effective request URI (<a href="#RFC3986" id="rfc.xref.RFC3986.2"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-5">Section 5</a>). If the original URI, as navigated to by the user agent, did contain a fragment identifier, and the final value does not,
     2364      <p id="rfc.section.10.5.p.4">The field value consists of a single URI-reference. When it has the form of a relative reference (<a href="#RFC3986" id="rfc.xref.RFC3986.1"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-4.2">Section 4.2</a>), the final value is computed by resolving it against the effective request URI (<a href="#RFC3986" id="rfc.xref.RFC3986.2"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-5">Section 5</a>). If the original URI, as navigated to by the user agent, did contain a fragment identifier, and the final value does not,
    23522365         then the original URI's fragment identifier is added to the final value.
    23532366      </p>
    2354       <div id="rfc.figure.u.24"></div>
     2367      <div id="rfc.figure.u.26"></div>
    23552368      <p>For example, the original URI "http://www.example.org/~tim", combined with a field value given as:</p>  <pre class="text">  Location: /pub/WWW/People.html#tim
    23562369</pre>  <p>would result in a final value of "http://www.example.org/pub/WWW/People.html#tim"</p>
    2357       <div id="rfc.figure.u.25"></div>
     2370      <div id="rfc.figure.u.27"></div>
    23582371      <p>An original URI "http://www.example.org/index.html#larry", combined with a field value given as:</p>  <pre class="text">  Location: http://www.example.net/index.html
    23592372</pre>  <p>would result in a final value of "http://www.example.net/index.html#larry", preserving the original fragment identifier.</p>
    2360       <div class="note" id="rfc.section.9.5.p.7">
     2373      <div class="note" id="rfc.section.10.5.p.7">
    23612374         <p> <b>Note:</b> Some recipients attempt to recover from Location fields that are not valid URI references. This specification does not mandate
    23622375            or define such processing, but does allow it (see <a href="#intro.conformance.and.error.handling" title="Conformance and Error Handling">Section&nbsp;1.1</a>).
    23632376         </p>
    23642377      </div>
    2365       <p id="rfc.section.9.5.p.8">There are circumstances in which a fragment identifier in a Location URI would not be appropriate. For instance, when it appears
     2378      <p id="rfc.section.10.5.p.8">There are circumstances in which a fragment identifier in a Location URI would not be appropriate. For instance, when it appears
    23662379         in a 201 Created response, where the Location header field specifies the URI for the entire created resource.
    23672380      </p>
    2368       <div class="note" id="rfc.section.9.5.p.9">
     2381      <div class="note" id="rfc.section.10.5.p.9">
    23692382         <p> <b>Note:</b> The Content-Location header field (<a href="p3-payload.html#header.content-location" title="Content-Location">Section 6.7</a> of <a href="#Part3" id="rfc.xref.Part3.13"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) differs from Location in that the Content-Location identifies the most specific resource corresponding to the enclosed representation.
    23702383            It is therefore possible for a response to contain header fields for both Location and Content-Location.
    … …  
    23732386      <div id="rfc.iref.m.9"></div>
    23742387      <div id="rfc.iref.h.7"></div>
    2375       <h2 id="rfc.section.9.6"><a href="#rfc.section.9.6">9.6</a>&nbsp;<a id="header.max-forwards" href="#header.max-forwards">Max-Forwards</a></h2>
    2376       <p id="rfc.section.9.6.p.1">The "Max-Forwards" header field provides a mechanism with the TRACE (<a href="#TRACE" id="rfc.xref.TRACE.2" title="TRACE">Section&nbsp;6.8</a>) and OPTIONS (<a href="#OPTIONS" id="rfc.xref.OPTIONS.2" title="OPTIONS">Section&nbsp;6.2</a>) methods to limit the number of times that the request is forwarded by proxies. This can be useful when the client is attempting
     2388      <h2 id="rfc.section.10.6"><a href="#rfc.section.10.6">10.6</a>&nbsp;<a id="header.max-forwards" href="#header.max-forwards">Max-Forwards</a></h2>
     2389      <p id="rfc.section.10.6.p.1">The "Max-Forwards" header field provides a mechanism with the TRACE (<a href="#TRACE" id="rfc.xref.TRACE.2" title="TRACE">Section&nbsp;6.8</a>) and OPTIONS (<a href="#OPTIONS" id="rfc.xref.OPTIONS.2" title="OPTIONS">Section&nbsp;6.2</a>) methods to limit the number of times that the request is forwarded by proxies. This can be useful when the client is attempting
    23772390         to trace a request which appears to be failing or looping mid-chain.
    23782391      </p>
    2379       <div id="rfc.figure.u.26"></div><pre class="inline"><span id="rfc.iref.g.31"></span>  <a href="#header.max-forwards" class="smpl">Max-Forwards</a> = 1*<a href="#notation" class="smpl">DIGIT</a>
    2380 </pre><p id="rfc.section.9.6.p.3">The Max-Forwards value is a decimal integer indicating the remaining number of times this request message can be forwarded.</p>
    2381       <p id="rfc.section.9.6.p.4">Each recipient of a TRACE or OPTIONS request containing a Max-Forwards header field <em class="bcp14">MUST</em> check and update its value prior to forwarding the request. If the received value is zero (0), the recipient <em class="bcp14">MUST NOT</em> forward the request; instead, it <em class="bcp14">MUST</em> respond as the final recipient. If the received Max-Forwards value is greater than zero, then the forwarded message <em class="bcp14">MUST</em> contain an updated Max-Forwards field with a value decremented by one (1).
    2382       </p>
    2383       <p id="rfc.section.9.6.p.5">The Max-Forwards header field <em class="bcp14">MAY</em> be ignored for all other request methods.
     2392      <div id="rfc.figure.u.28"></div><pre class="inline"><span id="rfc.iref.g.33"></span>  <a href="#header.max-forwards" class="smpl">Max-Forwards</a> = 1*<a href="#notation" class="smpl">DIGIT</a>
     2393</pre><p id="rfc.section.10.6.p.3">The Max-Forwards value is a decimal integer indicating the remaining number of times this request message can be forwarded.</p>
     2394      <p id="rfc.section.10.6.p.4">Each recipient of a TRACE or OPTIONS request containing a Max-Forwards header field <em class="bcp14">MUST</em> check and update its value prior to forwarding the request. If the received value is zero (0), the recipient <em class="bcp14">MUST NOT</em> forward the request; instead, it <em class="bcp14">MUST</em> respond as the final recipient. If the received Max-Forwards value is greater than zero, then the forwarded message <em class="bcp14">MUST</em> contain an updated Max-Forwards field with a value decremented by one (1).
     2395      </p>
     2396      <p id="rfc.section.10.6.p.5">The Max-Forwards header field <em class="bcp14">MAY</em> be ignored for all other request methods.
    23842397      </p>
    23852398      <div id="rfc.iref.r.1"></div>
    23862399      <div id="rfc.iref.h.8"></div>
    2387       <h2 id="rfc.section.9.7"><a href="#rfc.section.9.7">9.7</a>&nbsp;<a id="header.referer" href="#header.referer">Referer</a></h2>
    2388       <p id="rfc.section.9.7.p.1">The "Referer" [sic] header field allows the client to specify the URI of the resource from which the effective request URI
     2400      <h2 id="rfc.section.10.7"><a href="#rfc.section.10.7">10.7</a>&nbsp;<a id="header.referer" href="#header.referer">Referer</a></h2>
     2401      <p id="rfc.section.10.7.p.1">The "Referer" [sic] header field allows the client to specify the URI of the resource from which the effective request URI
    23892402         was obtained (the "referrer", although the header field is misspelled.).
    23902403      </p>
    2391       <p id="rfc.section.9.7.p.2">The Referer header field allows servers to generate lists of back-links to resources for interest, logging, optimized caching,
     2404      <p id="rfc.section.10.7.p.2">The Referer header field allows servers to generate lists of back-links to resources for interest, logging, optimized caching,
    23922405         etc. It also allows obsolete or mistyped links to be traced for maintenance. Some servers use Referer as a means of controlling
    23932406         where they allow links from (so-called "deep linking"), but legitimate requests do not always contain a Referer header field.
    23942407      </p>
    2395       <p id="rfc.section.9.7.p.3">If the effective request URI was obtained from a source that does not have its own URI (e.g., input from the user keyboard),
     2408      <p id="rfc.section.10.7.p.3">If the effective request URI was obtained from a source that does not have its own URI (e.g., input from the user keyboard),
    23962409         the Referer field <em class="bcp14">MUST</em> either be sent with the value "about:blank", or not be sent at all. Note that this requirement does not apply to sources with
    23972410         non-HTTP URIs (e.g., FTP).
    23982411      </p>
    2399       <div id="rfc.figure.u.27"></div><pre class="inline"><span id="rfc.iref.g.32"></span>  <a href="#header.referer" class="smpl">Referer</a> = <a href="#abnf.dependencies" class="smpl">absolute-URI</a> / <a href="#abnf.dependencies" class="smpl">partial-URI</a>
    2400 </pre><p id="rfc.section.9.7.p.5">Example:</p>
    2401       <div id="rfc.figure.u.28"></div><pre class="text">  Referer: http://www.example.org/hypertext/Overview.html
    2402 </pre><p id="rfc.section.9.7.p.7">If the field value is a relative URI, it <em class="bcp14">SHOULD</em> be interpreted relative to the effective request URI. The URI <em class="bcp14">MUST NOT</em> include a fragment. See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;11.2</a> for security considerations.
     2412      <div id="rfc.figure.u.29"></div><pre class="inline"><span id="rfc.iref.g.34"></span>  <a href="#header.referer" class="smpl">Referer</a> = <a href="#abnf.dependencies" class="smpl">absolute-URI</a> / <a href="#abnf.dependencies" class="smpl">partial-URI</a>
     2413</pre><p id="rfc.section.10.7.p.5">Example:</p>
     2414      <div id="rfc.figure.u.30"></div><pre class="text">  Referer: http://www.example.org/hypertext/Overview.html
     2415</pre><p id="rfc.section.10.7.p.7">If the field value is a relative URI, it <em class="bcp14">SHOULD</em> be interpreted relative to the effective request URI. The URI <em class="bcp14">MUST NOT</em> include a fragment. See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;12.2</a> for security considerations.
    24032416      </p>
    24042417      <div id="rfc.iref.r.2"></div>
    24052418      <div id="rfc.iref.h.9"></div>
    2406       <h2 id="rfc.section.9.8"><a href="#rfc.section.9.8">9.8</a>&nbsp;<a id="header.retry-after" href="#header.retry-after">Retry-After</a></h2>
    2407       <p id="rfc.section.9.8.p.1">The header "Retry-After" field can be used with a 503 (Service Unavailable) response to indicate how long the service is expected
     2419      <h2 id="rfc.section.10.8"><a href="#rfc.section.10.8">10.8</a>&nbsp;<a id="header.retry-after" href="#header.retry-after">Retry-After</a></h2>
     2420      <p id="rfc.section.10.8.p.1">The header "Retry-After" field can be used with a 503 (Service Unavailable) response to indicate how long the service is expected
    24082421         to be unavailable to the requesting client. This field <em class="bcp14">MAY</em> also be used with any 3xx (Redirection) response to indicate the minimum time the user-agent is asked to wait before issuing
    24092422         the redirected request.
    24102423      </p>
    2411       <p id="rfc.section.9.8.p.2">The value of this field can be either an HTTP-date or an integer number of seconds (in decimal) after the time of the response.</p>
    2412       <div id="rfc.figure.u.29"></div><pre class="inline"><span id="rfc.iref.g.33"></span>  <a href="#header.retry-after" class="smpl">Retry-After</a> = <a href="#http.date" class="smpl">HTTP-date</a> / <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>
     2424      <p id="rfc.section.10.8.p.2">The value of this field can be either an HTTP-date or an integer number of seconds (in decimal) after the time of the response.</p>
     2425      <div id="rfc.figure.u.31"></div><pre class="inline"><span id="rfc.iref.g.35"></span>  <a href="#header.retry-after" class="smpl">Retry-After</a> = <a href="#http.date" class="smpl">HTTP-date</a> / <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>
    24132426</pre><div id="rule.delta-seconds">
    2414          <p id="rfc.section.9.8.p.4">  Time spans are non-negative decimal integers, representing time in seconds.</p>
     2427         <p id="rfc.section.10.8.p.4">  Time spans are non-negative decimal integers, representing time in seconds.</p>
    24152428      </div>
    2416       <div id="rfc.figure.u.30"></div><pre class="inline"><span id="rfc.iref.g.34"></span>  <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>  = 1*<a href="#notation" class="smpl">DIGIT</a>
    2417 </pre><p id="rfc.section.9.8.p.6">Two examples of its use are</p>
    2418       <div id="rfc.figure.u.31"></div><pre class="text">  Retry-After: Fri, 31 Dec 1999 23:59:59 GMT
     2429      <div id="rfc.figure.u.32"></div><pre class="inline"><span id="rfc.iref.g.36"></span>  <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>  = 1*<a href="#notation" class="smpl">DIGIT</a>
     2430</pre><p id="rfc.section.10.8.p.6">Two examples of its use are</p>
     2431      <div id="rfc.figure.u.33"></div><pre class="text">  Retry-After: Fri, 31 Dec 1999 23:59:59 GMT
    24192432  Retry-After: 120
    2420 </pre><p id="rfc.section.9.8.p.8">In the latter example, the delay is 2 minutes.</p>
     2433</pre><p id="rfc.section.10.8.p.8">In the latter example, the delay is 2 minutes.</p>
    24212434      <div id="rfc.iref.s.38"></div>
    24222435      <div id="rfc.iref.h.10"></div>
    2423       <h2 id="rfc.section.9.9"><a href="#rfc.section.9.9">9.9</a>&nbsp;<a id="header.server" href="#header.server">Server</a></h2>
    2424       <p id="rfc.section.9.9.p.1">The "Server" header field contains information about the software used by the origin server to handle the request.</p>
    2425       <p id="rfc.section.9.9.p.2">The field can contain multiple product tokens (<a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 5.2</a> of <a href="#Part1" id="rfc.xref.Part1.39"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.40"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the server and any significant subproducts. The product tokens are listed in order of their significance for
     2436      <h2 id="rfc.section.10.9"><a href="#rfc.section.10.9">10.9</a>&nbsp;<a id="header.server" href="#header.server">Server</a></h2>
     2437      <p id="rfc.section.10.9.p.1">The "Server" header field contains information about the software used by the origin server to handle the request.</p>
     2438      <p id="rfc.section.10.9.p.2">The field can contain multiple product tokens (<a href="#product.tokens" title="Product Tokens">Section&nbsp;9</a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.38"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the server and any significant subproducts. The product tokens are listed in order of their significance for
    24262439         identifying the application.
    24272440      </p>
    2428       <div id="rfc.figure.u.32"></div><pre class="inline"><span id="rfc.iref.g.35"></span>  <a href="#header.server" class="smpl">Server</a> = <a href="#abnf.dependencies" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#abnf.dependencies" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
    2429 </pre><p id="rfc.section.9.9.p.4">Example:</p>
    2430       <div id="rfc.figure.u.33"></div><pre class="text">  Server: CERN/3.0 libwww/2.17
    2431 </pre><p id="rfc.section.9.9.p.6">If the response is being forwarded through a proxy, the proxy application <em class="bcp14">MUST NOT</em> modify the Server header field. Instead, it <em class="bcp14">MUST</em> include a Via field (as described in <a href="p1-messaging.html#header.via" title="Via">Section 8.8</a> of <a href="#Part1" id="rfc.xref.Part1.41"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    2432       </p>
    2433       <div class="note" id="rfc.section.9.9.p.7">
     2441      <div id="rfc.figure.u.34"></div><pre class="inline"><span id="rfc.iref.g.37"></span>  <a href="#header.server" class="smpl">Server</a> = <a href="#product.tokens" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#product.tokens" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
     2442</pre><p id="rfc.section.10.9.p.4">Example:</p>
     2443      <div id="rfc.figure.u.35"></div><pre class="text">  Server: CERN/3.0 libwww/2.17
     2444</pre><p id="rfc.section.10.9.p.6">If the response is being forwarded through a proxy, the proxy application <em class="bcp14">MUST NOT</em> modify the Server header field. Instead, it <em class="bcp14">MUST</em> include a Via field (as described in <a href="p1-messaging.html#header.via" title="Via">Section 9.4</a> of <a href="#Part1" id="rfc.xref.Part1.39"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     2445      </p>
     2446      <div class="note" id="rfc.section.10.9.p.7">
    24342447         <p> <b>Note:</b> Revealing the specific software version of the server might allow the server machine to become more vulnerable to attacks
    24352448            against software that is known to contain security holes. Server implementors are encouraged to make this field a configurable
    … …  
    24392452      <div id="rfc.iref.u.1"></div>
    24402453      <div id="rfc.iref.h.11"></div>
    2441       <h2 id="rfc.section.9.10"><a href="#rfc.section.9.10">9.10</a>&nbsp;<a id="header.user-agent" href="#header.user-agent">User-Agent</a></h2>
    2442       <p id="rfc.section.9.10.p.1">The "User-Agent" header field contains information about the user agent originating the request. User agents <em class="bcp14">SHOULD</em> include this field with requests.
    2443       </p>
    2444       <p id="rfc.section.9.10.p.2">Typically, it is used for statistical purposes, the tracing of protocol violations, and tailoring responses to avoid particular
     2454      <h2 id="rfc.section.10.10"><a href="#rfc.section.10.10">10.10</a>&nbsp;<a id="header.user-agent" href="#header.user-agent">User-Agent</a></h2>
     2455      <p id="rfc.section.10.10.p.1">The "User-Agent" header field contains information about the user agent originating the request. User agents <em class="bcp14">SHOULD</em> include this field with requests.
     2456      </p>
     2457      <p id="rfc.section.10.10.p.2">Typically, it is used for statistical purposes, the tracing of protocol violations, and tailoring responses to avoid particular
    24452458         user agent limitations.
    24462459      </p>
    2447       <p id="rfc.section.9.10.p.3">The field can contain multiple product tokens (<a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 5.2</a> of <a href="#Part1" id="rfc.xref.Part1.42"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.43"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the agent and its significant subproducts. By convention, the product tokens are listed in order of their significance
     2460      <p id="rfc.section.10.10.p.3">The field can contain multiple product tokens (<a href="#product.tokens" title="Product Tokens">Section&nbsp;9</a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.40"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the agent and its significant subproducts. By convention, the product tokens are listed in order of their significance
    24482461         for identifying the application.
    24492462      </p>
    2450       <p id="rfc.section.9.10.p.4">Because this field is usually sent on every request a user agent makes, implementations are encouraged not to include needlessly
     2463      <p id="rfc.section.10.10.p.4">Because this field is usually sent on every request a user agent makes, implementations are encouraged not to include needlessly
    24512464         fine-grained detail, and to limit (or even prohibit) the addition of subproducts by third parties. Overly long and detailed
    24522465         User-Agent field values make requests larger and can also be used to identify ("fingerprint") the user against their wishes.
    24532466      </p>
    2454       <p id="rfc.section.9.10.p.5">Likewise, implementations are encouraged not to use the product tokens of other implementations in order to declare compatibility
     2467      <p id="rfc.section.10.10.p.5">Likewise, implementations are encouraged not to use the product tokens of other implementations in order to declare compatibility
    24552468         with them, as this circumvents the purpose of the field. Finally, they are encouraged not to use comments to identify products;
    24562469         doing so makes the field value more difficult to parse.
    24572470      </p>
    2458       <div id="rfc.figure.u.34"></div><pre class="inline"><span id="rfc.iref.g.36"></span>  <a href="#header.user-agent" class="smpl">User-Agent</a> = <a href="#abnf.dependencies" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#abnf.dependencies" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
    2459 </pre><p id="rfc.section.9.10.p.7">Example:</p>
    2460       <div id="rfc.figure.u.35"></div><pre class="text">  User-Agent: CERN-LineMode/2.15 libwww/2.17b3
    2461 </pre><h1 id="rfc.section.10"><a href="#rfc.section.10">10.</a>&nbsp;<a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1>
    2462       <h2 id="rfc.section.10.1"><a href="#rfc.section.10.1">10.1</a>&nbsp;<a id="method.registration" href="#method.registration">Method Registry</a></h2>
    2463       <p id="rfc.section.10.1.p.1">The registration procedure for HTTP request methods is defined by <a href="#method.registry" title="Method Registry">Section&nbsp;2.2</a> of this document.
    2464       </p>
    2465       <p id="rfc.section.10.1.p.2">The HTTP Method Registry shall be created at &lt;<a href="http://www.iana.org/assignments/http-methods">http://www.iana.org/assignments/http-methods</a>&gt; and be populated with the registrations below:
     2471      <div id="rfc.figure.u.36"></div><pre class="inline"><span id="rfc.iref.g.38"></span>  <a href="#header.user-agent" class="smpl">User-Agent</a> = <a href="#product.tokens" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#product.tokens" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
     2472</pre><p id="rfc.section.10.10.p.7">Example:</p>
     2473      <div id="rfc.figure.u.37"></div><pre class="text">  User-Agent: CERN-LineMode/2.15 libwww/2.17b3
     2474</pre><h1 id="rfc.section.11"><a href="#rfc.section.11">11.</a>&nbsp;<a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1>
     2475      <h2 id="rfc.section.11.1"><a href="#rfc.section.11.1">11.1</a>&nbsp;<a id="method.registration" href="#method.registration">Method Registry</a></h2>
     2476      <p id="rfc.section.11.1.p.1">The registration procedure for HTTP request methods is defined by <a href="#method.registry" title="Method Registry">Section&nbsp;2.2</a> of this document.
     2477      </p>
     2478      <p id="rfc.section.11.1.p.2">The HTTP Method Registry shall be created at &lt;<a href="http://www.iana.org/assignments/http-methods">http://www.iana.org/assignments/http-methods</a>&gt; and be populated with the registrations below:
    24662479      </p>
    24672480      <div id="rfc.table.1">
    … …  
    25272540         </table>
    25282541      </div>
    2529       <h2 id="rfc.section.10.2"><a href="#rfc.section.10.2">10.2</a>&nbsp;<a id="status.code.registration" href="#status.code.registration">Status Code Registry</a></h2>
    2530       <p id="rfc.section.10.2.p.1">The registration procedure for HTTP Status Codes — previously defined in <a href="http://tools.ietf.org/html/rfc2817#section-7.1">Section 7.1</a> of <a href="#RFC2817" id="rfc.xref.RFC2817.1"><cite title="Upgrading to TLS Within HTTP/1.1">[RFC2817]</cite></a> — is now defined by <a href="#status.code.registry" title="Status Code Registry">Section&nbsp;4.2</a> of this document.
    2531       </p>
    2532       <p id="rfc.section.10.2.p.2">The HTTP Status Code Registry located at &lt;<a href="http://www.iana.org/assignments/http-status-codes">http://www.iana.org/assignments/http-status-codes</a>&gt; shall be updated with the registrations below:
     2542      <h2 id="rfc.section.11.2"><a href="#rfc.section.11.2">11.2</a>&nbsp;<a id="status.code.registration" href="#status.code.registration">Status Code Registry</a></h2>
     2543      <p id="rfc.section.11.2.p.1">The registration procedure for HTTP Status Codes — previously defined in <a href="http://tools.ietf.org/html/rfc2817#section-7.1">Section 7.1</a> of <a href="#RFC2817" id="rfc.xref.RFC2817.1"><cite title="Upgrading to TLS Within HTTP/1.1">[RFC2817]</cite></a> — is now defined by <a href="#status.code.registry" title="Status Code Registry">Section&nbsp;4.2</a> of this document.
     2544      </p>
     2545      <p id="rfc.section.11.2.p.2">The HTTP Status Code Registry located at &lt;<a href="http://www.iana.org/assignments/http-status-codes">http://www.iana.org/assignments/http-status-codes</a>&gt; shall be updated with the registrations below:
    25332546      </p>
    25342547      <div id="rfc.table.2">
    … …  
    27622775         </table>
    27632776      </div>
    2764       <h2 id="rfc.section.10.3"><a href="#rfc.section.10.3">10.3</a>&nbsp;<a id="header.field.registration" href="#header.field.registration">Header Field Registration</a></h2>
    2765       <p id="rfc.section.10.3.p.1">The Message Header Field Registry located at &lt;<a href="http://www.iana.org/assignments/message-headers/message-header-index.html">http://www.iana.org/assignments/message-headers/message-header-index.html</a>&gt; shall be updated with the permanent registrations below (see <a href="#RFC3864" id="rfc.xref.RFC3864.3"><cite title="Registration Procedures for Message Header Fields">[RFC3864]</cite></a>):
     2777      <h2 id="rfc.section.11.3"><a href="#rfc.section.11.3">11.3</a>&nbsp;<a id="header.field.registration" href="#header.field.registration">Header Field Registration</a></h2>
     2778      <p id="rfc.section.11.3.p.1">The Message Header Field Registry located at &lt;<a href="http://www.iana.org/assignments/message-headers/message-header-index.html">http://www.iana.org/assignments/message-headers/message-header-index.html</a>&gt; shall be updated with the permanent registrations below (see <a href="#RFC3864" id="rfc.xref.RFC3864.3"><cite title="Registration Procedures for Message Header Fields">[RFC3864]</cite></a>):
    27662779      </p>
    27672780      <div id="rfc.table.3">
    … …  
    27812794                  <td class="left">http</td>
    27822795                  <td class="left">standard</td>
    2783                   <td class="left"> <a href="#header.allow" id="rfc.xref.header.allow.3" title="Allow">Section&nbsp;9.1</a>
     2796                  <td class="left"> <a href="#header.allow" id="rfc.xref.header.allow.3" title="Allow">Section&nbsp;10.1</a>
    27842797                  </td>
    27852798               </tr>
    … …  
    27882801                  <td class="left">http</td>
    27892802                  <td class="left">standard</td>
    2790                   <td class="left"> <a href="#header.date" id="rfc.xref.header.date.2" title="Date">Section&nbsp;9.2</a>
     2803                  <td class="left"> <a href="#header.date" id="rfc.xref.header.date.2" title="Date">Section&nbsp;10.2</a>
    27912804                  </td>
    27922805               </tr>
    … …  
    27952808                  <td class="left">http</td>
    27962809                  <td class="left">standard</td>
    2797                   <td class="left"> <a href="#header.expect" id="rfc.xref.header.expect.3" title="Expect">Section&nbsp;9.3</a>
     2810                  <td class="left"> <a href="#header.expect" id="rfc.xref.header.expect.3" title="Expect">Section&nbsp;10.3</a>
    27982811                  </td>
    27992812               </tr>
    … …  
    28022815                  <td class="left">http</td>
    28032816                  <td class="left">standard</td>
    2804                   <td class="left"> <a href="#header.from" id="rfc.xref.header.from.2" title="From">Section&nbsp;9.4</a>
     2817                  <td class="left"> <a href="#header.from" id="rfc.xref.header.from.2" title="From">Section&nbsp;10.4</a>
    28052818                  </td>
    28062819               </tr>
    … …  
    28092822                  <td class="left">http</td>
    28102823                  <td class="left">standard</td>
    2811                   <td class="left"> <a href="#header.location" id="rfc.xref.header.location.4" title="Location">Section&nbsp;9.5</a>
     2824                  <td class="left"> <a href="#header.location" id="rfc.xref.header.location.4" title="Location">Section&nbsp;10.5</a>
    28122825                  </td>
    28132826               </tr>
    … …  
    28162829                  <td class="left">http</td>
    28172830                  <td class="left">standard</td>
    2818                   <td class="left"> <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.4" title="Max-Forwards">Section&nbsp;9.6</a>
     2831                  <td class="left"> <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.4" title="Max-Forwards">Section&nbsp;10.6</a>
    28192832                  </td>
    28202833               </tr>
    … …  
    28232836                  <td class="left">http</td>
    28242837                  <td class="left">standard</td>
    2825                   <td class="left"> <a href="#header.referer" id="rfc.xref.header.referer.2" title="Referer">Section&nbsp;9.7</a>
     2838                  <td class="left"> <a href="#header.referer" id="rfc.xref.header.referer.2" title="Referer">Section&nbsp;10.7</a>
    28262839                  </td>
    28272840               </tr>
    … …  
    28302843                  <td class="left">http</td>
    28312844                  <td class="left">standard</td>
    2832                   <td class="left"> <a href="#header.retry-after" id="rfc.xref.header.retry-after.3" title="Retry-After">Section&nbsp;9.8</a>
     2845                  <td class="left"> <a href="#header.retry-after" id="rfc.xref.header.retry-after.3" title="Retry-After">Section&nbsp;10.8</a>
    28332846                  </td>
    28342847               </tr>
    … …  
    28372850                  <td class="left">http</td>
    28382851                  <td class="left">standard</td>
    2839                   <td class="left"> <a href="#header.server" id="rfc.xref.header.server.2" title="Server">Section&nbsp;9.9</a>
     2852                  <td class="left"> <a href="#header.server" id="rfc.xref.header.server.2" title="Server">Section&nbsp;10.9</a>
    28402853                  </td>
    28412854               </tr>
    … …  
    28442857                  <td class="left">http</td>
    28452858                  <td class="left">standard</td>
    2846                   <td class="left"> <a href="#header.user-agent" id="rfc.xref.header.user-agent.2" title="User-Agent">Section&nbsp;9.10</a>
     2859                  <td class="left"> <a href="#header.user-agent" id="rfc.xref.header.user-agent.2" title="User-Agent">Section&nbsp;10.10</a>
    28472860                  </td>
    28482861               </tr>
    … …  
    28502863         </table>
    28512864      </div>
    2852       <p id="rfc.section.10.3.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p>
    2853       <h1 id="rfc.section.11"><a href="#rfc.section.11">11.</a>&nbsp;<a id="security.considerations" href="#security.considerations">Security Considerations</a></h1>
    2854       <p id="rfc.section.11.p.1">This section is meant to inform application developers, information providers, and users of the security limitations in HTTP/1.1
     2865      <p id="rfc.section.11.3.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p>
     2866      <h1 id="rfc.section.12"><a href="#rfc.section.12">12.</a>&nbsp;<a id="security.considerations" href="#security.considerations">Security Considerations</a></h1>
     2867      <p id="rfc.section.12.p.1">This section is meant to inform application developers, information providers, and users of the security limitations in HTTP/1.1
    28552868         as described by this document. The discussion does not include definitive solutions to the problems revealed, though it does
    28562869         make some suggestions for reducing security risks.
    28572870      </p>
    2858       <h2 id="rfc.section.11.1"><a href="#rfc.section.11.1">11.1</a>&nbsp;<a id="security.sensitive" href="#security.sensitive">Transfer of Sensitive Information</a></h2>
    2859       <p id="rfc.section.11.1.p.1">Like any generic data transfer protocol, HTTP cannot regulate the content of the data that is transferred, nor is there any
     2871      <h2 id="rfc.section.12.1"><a href="#rfc.section.12.1">12.1</a>&nbsp;<a id="security.sensitive" href="#security.sensitive">Transfer of Sensitive Information</a></h2>
     2872      <p id="rfc.section.12.1.p.1">Like any generic data transfer protocol, HTTP cannot regulate the content of the data that is transferred, nor is there any
    28602873         a priori method of determining the sensitivity of any particular piece of information within the context of any given request.
    28612874         Therefore, applications <em class="bcp14">SHOULD</em> supply as much control over this information as possible to the provider of that information. Four header fields are worth
    28622875         special mention in this context: Server, Via, Referer and From.
    28632876      </p>
    2864       <p id="rfc.section.11.1.p.2">Revealing the specific software version of the server might allow the server machine to become more vulnerable to attacks
     2877      <p id="rfc.section.12.1.p.2">Revealing the specific software version of the server might allow the server machine to become more vulnerable to attacks
    28652878         against software that is known to contain security holes. Implementors <em class="bcp14">SHOULD</em> make the Server header field a configurable option.
    28662879      </p>
    2867       <p id="rfc.section.11.1.p.3">Proxies which serve as a portal through a network firewall <em class="bcp14">SHOULD</em> take special precautions regarding the transfer of header information that identifies the hosts behind the firewall. In particular,
     2880      <p id="rfc.section.12.1.p.3">Proxies which serve as a portal through a network firewall <em class="bcp14">SHOULD</em> take special precautions regarding the transfer of header information that identifies the hosts behind the firewall. In particular,
    28682881         they <em class="bcp14">SHOULD</em> remove, or replace with sanitized versions, any Via fields generated behind the firewall.
    28692882      </p>
    2870       <p id="rfc.section.11.1.p.4">The Referer header field allows reading patterns to be studied and reverse links drawn. Although it can be very useful, its
     2883      <p id="rfc.section.12.1.p.4">The Referer header field allows reading patterns to be studied and reverse links drawn. Although it can be very useful, its
    28712884         power can be abused if user details are not separated from the information contained in the Referer. Even when the personal
    28722885         information has been removed, the Referer header field might indicate a private document's URI whose publication would be
    28732886         inappropriate.
    28742887      </p>
    2875       <p id="rfc.section.11.1.p.5">The information sent in the From field might conflict with the user's privacy interests or their site's security policy, and
     2888      <p id="rfc.section.12.1.p.5">The information sent in the From field might conflict with the user's privacy interests or their site's security policy, and
    28762889         hence it <em class="bcp14">SHOULD NOT</em> be transmitted without the user being able to disable, enable, and modify the contents of the field. The user <em class="bcp14">MUST</em> be able to set the contents of this field within a user preference or application defaults configuration.
    28772890      </p>
    2878       <p id="rfc.section.11.1.p.6">We suggest, though do not require, that a convenient toggle interface be provided for the user to enable or disable the sending
     2891      <p id="rfc.section.12.1.p.6">We suggest, though do not require, that a convenient toggle interface be provided for the user to enable or disable the sending
    28792892         of From and Referer information.
    28802893      </p>
    2881       <p id="rfc.section.11.1.p.7">The User-Agent (<a href="#header.user-agent" id="rfc.xref.header.user-agent.3" title="User-Agent">Section&nbsp;9.10</a>) or Server (<a href="#header.server" id="rfc.xref.header.server.3" title="Server">Section&nbsp;9.9</a>) header fields can sometimes be used to determine that a specific client or server has a particular security hole which might
     2894      <p id="rfc.section.12.1.p.7">The User-Agent (<a href="#header.user-agent" id="rfc.xref.header.user-agent.3" title="User-Agent">Section&nbsp;10.10</a>) or Server (<a href="#header.server" id="rfc.xref.header.server.3" title="Server">Section&nbsp;10.9</a>) header fields can sometimes be used to determine that a specific client or server has a particular security hole which might
    28822895         be exploited. Unfortunately, this same information is often used for other valuable purposes for which HTTP currently has
    28832896         no better mechanism.
    28842897      </p>
    2885       <p id="rfc.section.11.1.p.8">Furthermore, the User-Agent header field may contain enough entropy to be used, possibly in conjunction with other material,
     2898      <p id="rfc.section.12.1.p.8">Furthermore, the User-Agent header field may contain enough entropy to be used, possibly in conjunction with other material,
    28862899         to uniquely identify the user.
    28872900      </p>
    2888       <p id="rfc.section.11.1.p.9">Some request methods, like TRACE (<a href="#TRACE" id="rfc.xref.TRACE.4" title="TRACE">Section&nbsp;6.8</a>), expose information that was sent in request header fields within the body of their response. Clients <em class="bcp14">SHOULD</em> be careful with sensitive information, like Cookies, Authorization credentials, and other header fields that might be used
     2901      <p id="rfc.section.12.1.p.9">Some request methods, like TRACE (<a href="#TRACE" id="rfc.xref.TRACE.4" title="TRACE">Section&nbsp;6.8</a>), expose information that was sent in request header fields within the body of their response. Clients <em class="bcp14">SHOULD</em> be careful with sensitive information, like Cookies, Authorization credentials, and other header fields that might be used
    28892902         to collect data from the client.
    28902903      </p>
    2891       <h2 id="rfc.section.11.2"><a href="#rfc.section.11.2">11.2</a>&nbsp;<a id="encoding.sensitive.information.in.uris" href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></h2>
    2892       <p id="rfc.section.11.2.p.1">Because the source of a link might be private information or might reveal an otherwise private information source, it is strongly
     2904      <h2 id="rfc.section.12.2"><a href="#rfc.section.12.2">12.2</a>&nbsp;<a id="encoding.sensitive.information.in.uris" href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></h2>
     2905      <p id="rfc.section.12.2.p.1">Because the source of a link might be private information or might reveal an otherwise private information source, it is strongly
    28932906         recommended that the user be able to select whether or not the Referer field is sent. For example, a browser client could
    28942907         have a toggle switch for browsing openly/anonymously, which would respectively enable/disable the sending of Referer and From
    28952908         information.
    28962909      </p>
    2897       <p id="rfc.section.11.2.p.2">Clients <em class="bcp14">SHOULD NOT</em> include a Referer header field in a (non-secure) HTTP request if the referring page was transferred with a secure protocol.
    2898       </p>
    2899       <p id="rfc.section.11.2.p.3">Authors of services <em class="bcp14">SHOULD NOT</em> use GET-based forms for the submission of sensitive data because that data will be placed in the request-target. Many existing
     2910      <p id="rfc.section.12.2.p.2">Clients <em class="bcp14">SHOULD NOT</em> include a Referer header field in a (non-secure) HTTP request if the referring page was transferred with a secure protocol.
     2911      </p>
     2912      <p id="rfc.section.12.2.p.3">Authors of services <em class="bcp14">SHOULD NOT</em> use GET-based forms for the submission of sensitive data because that data will be placed in the request-target. Many existing
    29002913         servers, proxies, and user agents log or display the request-target in places where it might be visible to third parties.
    29012914         Such services can use POST-based form submission instead.
    29022915      </p>
    2903       <h2 id="rfc.section.11.3"><a href="#rfc.section.11.3">11.3</a>&nbsp;<a id="location.spoofing-leakage" href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></h2>
    2904       <p id="rfc.section.11.3.p.1">If a single server supports multiple organizations that do not trust one another, then it <em class="bcp14">MUST</em> check the values of Location and Content-Location header fields in responses that are generated under control of said organizations
     2916      <h2 id="rfc.section.12.3"><a href="#rfc.section.12.3">12.3</a>&nbsp;<a id="location.spoofing-leakage" href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></h2>
     2917      <p id="rfc.section.12.3.p.1">If a single server supports multiple organizations that do not trust one another, then it <em class="bcp14">MUST</em> check the values of Location and Content-Location header fields in responses that are generated under control of said organizations
    29052918         to make sure that they do not attempt to invalidate resources over which they have no authority.
    29062919      </p>
    2907       <p id="rfc.section.11.3.p.2">Furthermore, appending the fragment identifier from one URI to another one obtained from a Location header field might leak
     2920      <p id="rfc.section.12.3.p.2">Furthermore, appending the fragment identifier from one URI to another one obtained from a Location header field might leak
    29082921         confidential information to the target server — although the fragment identifier is not transmitted in the final request,
    29092922         it might be visible to the user agent through other means, such as scripting.
    29102923      </p>
    2911       <h2 id="rfc.section.11.4"><a href="#rfc.section.11.4">11.4</a>&nbsp;Security Considerations for CONNECT
     2924      <h2 id="rfc.section.12.4"><a href="#rfc.section.12.4">12.4</a>&nbsp;Security Considerations for CONNECT
    29122925      </h2>
    2913       <p id="rfc.section.11.4.p.1">Since tunneled data is opaque to the proxy, there are additional risks to tunneling to other well-known or reserved ports.
     2926      <p id="rfc.section.12.4.p.1">Since tunneled data is opaque to the proxy, there are additional risks to tunneling to other well-known or reserved ports.
    29142927         A HTTP client CONNECTing to port 25 could relay spam via SMTP, for example. As such, proxies <em class="bcp14">SHOULD</em> restrict CONNECT access to a small number of known ports.
    29152928      </p>
    2916       <h1 id="rfc.section.12"><a href="#rfc.section.12">12.</a>&nbsp;<a id="acks" href="#acks">Acknowledgments</a></h1>
    2917       <p id="rfc.section.12.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 11</a> of <a href="#Part1" id="rfc.xref.Part1.44"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
    2918       </p>
    2919       <h1 id="rfc.references"><a id="rfc.section.13" href="#rfc.section.13">13.</a> References
     2929      <h1 id="rfc.section.13"><a href="#rfc.section.13">13.</a>&nbsp;<a id="acks" href="#acks">Acknowledgments</a></h1>
     2930      <p id="rfc.section.13.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 12</a> of <a href="#Part1" id="rfc.xref.Part1.41"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
     2931      </p>
     2932      <h1 id="rfc.references"><a id="rfc.section.14" href="#rfc.section.14">14.</a> References
    29202933      </h1>
    2921       <h2 id="rfc.references.1"><a href="#rfc.section.13.1" id="rfc.section.13.1">13.1</a> Normative References
     2934      <h2 id="rfc.references.1"><a href="#rfc.section.14.1" id="rfc.section.14.1">14.1</a> Normative References
    29222935      </h2>
    29232936      <table>                 
    … …  
    29682981         </tr>
    29692982      </table>
    2970       <h2 id="rfc.references.2"><a href="#rfc.section.13.2" id="rfc.section.13.2">13.2</a> Informative References
     2983      <h2 id="rfc.references.2"><a href="#rfc.section.14.2" id="rfc.section.14.2">14.2</a> Informative References
    29712984      </h2>
    29722985      <table>                   
    … …  
    30633076      <p id="rfc.section.A.p.9">Define status 426 (Upgrade Required) (this was incorporated from <a href="#RFC2817" id="rfc.xref.RFC2817.4"><cite title="Upgrading to TLS Within HTTP/1.1">[RFC2817]</cite></a>). (<a href="#status.426" id="rfc.xref.status.426.3" title="426 Upgrade Required">Section&nbsp;7.4.15</a>)
    30643077      </p>
    3065       <p id="rfc.section.A.p.10">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;9</a>)
     3078      <p id="rfc.section.A.p.10">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;10</a>)
    30663079      </p>
    30673080      <p id="rfc.section.A.p.11">Reclassify "Allow" as response header field, removing the option to specify it in a PUT request. Relax the server requirement
    3068          on the contents of the Allow header field and remove requirement on clients to always trust the header field value. (<a href="#header.allow" id="rfc.xref.header.allow.4" title="Allow">Section&nbsp;9.1</a>)
     3081         on the contents of the Allow header field and remove requirement on clients to always trust the header field value. (<a href="#header.allow" id="rfc.xref.header.allow.4" title="Allow">Section&nbsp;10.1</a>)
    30693082      </p>
    30703083      <p id="rfc.section.A.p.12">The ABNF for the Expect header field has been both fixed (allowing parameters for value-less expectations as well) and simplified
    3071          (allowing trailing semicolons after "100-continue" when they were invalid before). (<a href="#header.expect" id="rfc.xref.header.expect.4" title="Expect">Section&nbsp;9.3</a>)
     3084         (allowing trailing semicolons after "100-continue" when they were invalid before). (<a href="#header.expect" id="rfc.xref.header.expect.4" title="Expect">Section&nbsp;10.3</a>)
    30723085      </p>
    30733086      <p id="rfc.section.A.p.13">Correct syntax of Location header field to allow URI references (including relative references and fragments), as referred
    30743087         symbol "absoluteURI" wasn't what was expected, and add some clarifications as to when use of fragments would not be appropriate.
    3075          (<a href="#header.location" id="rfc.xref.header.location.5" title="Location">Section&nbsp;9.5</a>)
    3076       </p>
    3077       <p id="rfc.section.A.p.14">Restrict Max-Forwards header field to OPTIONS and TRACE (previously, extension methods could have used it as well). (<a href="#header.max-forwards" id="rfc.xref.header.max-forwards.5" title="Max-Forwards">Section&nbsp;9.6</a>)
    3078       </p>
    3079       <p id="rfc.section.A.p.15">Allow Referer field value of "about:blank" as alternative to not specifying it. (<a href="#header.referer" id="rfc.xref.header.referer.3" title="Referer">Section&nbsp;9.7</a>)
     3088         (<a href="#header.location" id="rfc.xref.header.location.5" title="Location">Section&nbsp;10.5</a>)
     3089      </p>
     3090      <p id="rfc.section.A.p.14">Restrict Max-Forwards header field to OPTIONS and TRACE (previously, extension methods could have used it as well). (<a href="#header.max-forwards" id="rfc.xref.header.max-forwards.5" title="Max-Forwards">Section&nbsp;10.6</a>)
     3091      </p>
     3092      <p id="rfc.section.A.p.15">Allow Referer field value of "about:blank" as alternative to not specifying it. (<a href="#header.referer" id="rfc.xref.header.referer.3" title="Referer">Section&nbsp;10.7</a>)
    30803093      </p>
    30813094      <p id="rfc.section.A.p.16">In the description of the Server header field, the Via field was described as a SHOULD. The requirement was and is stated
    3082          correctly in the description of the Via header field in <a href="p1-messaging.html#header.via" title="Via">Section 8.8</a> of <a href="#Part1" id="rfc.xref.Part1.45"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. (<a href="#header.server" id="rfc.xref.header.server.4" title="Server">Section&nbsp;9.9</a>)
     3095         correctly in the description of the Via header field in <a href="p1-messaging.html#header.via" title="Via">Section 9.4</a> of <a href="#Part1" id="rfc.xref.Part1.42"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. (<a href="#header.server" id="rfc.xref.header.server.4" title="Server">Section&nbsp;10.9</a>)
    30833096      </p>
    30843097      <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="collected.abnf" href="#collected.abnf">Collected ABNF</a></h1>
    3085       <div id="rfc.figure.u.36"></div> <pre class="inline"><a href="#header.allow" class="smpl">Allow</a> = [ ( "," / Method ) *( OWS "," [ OWS Method ] ) ]
     3098      <div id="rfc.figure.u.38"></div> <pre class="inline"><a href="#header.allow" class="smpl">Allow</a> = [ ( "," / Method ) *( OWS "," [ OWS Method ] ) ]
    30863099
    30873100<a href="#core.rules" class="smpl">BWS</a> = &lt;BWS, defined in [Part1], Section 3.2.1&gt;
    … …  
    31673180
    31683181<a href="#abnf.dependencies" class="smpl">partial-URI</a> = &lt;partial-URI, defined in [Part1], Section 2.7&gt;
    3169 <a href="#abnf.dependencies" class="smpl">product</a> = &lt;product, defined in [Part1], Section 5.2&gt;
     3182<a href="#product.tokens" class="smpl">product</a> = &lt;product, defined in [Part1], Section 5.2&gt;
    31703183
    31713184<a href="#core.rules" class="smpl">quoted-string</a> = &lt;quoted-string, defined in [Part1], Section 3.2.4&gt;
    … …  
    31803193
    31813194<a href="#preferred.date.format" class="smpl">year</a> = 4DIGIT
    3182 </pre> <div id="rfc.figure.u.37"></div>
     3195</pre> <div id="rfc.figure.u.39"></div>
    31833196      <p>ABNF diagnostics:</p><pre class="inline">; Allow defined but not used
    31843197; Date defined but not used
    … …  
    35103523         <ul class="ind">
    35113524            <li><a id="rfc.index.1" href="#rfc.index.1"><b>1</b></a><ul>
    3512                   <li>100 Continue (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.22"><b>7.1.1</b></a>, <a href="#rfc.xref.status.100.2">10.2</a></li>
    3513                   <li>100-continue (expect value)&nbsp;&nbsp;<a href="#rfc.iref.87"><b>9.3</b></a></li>
    3514                   <li>101 Switching Protocols (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.23"><b>7.1.2</b></a>, <a href="#rfc.xref.status.101.2">10.2</a></li>
     3525                  <li>100 Continue (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.22"><b>7.1.1</b></a>, <a href="#rfc.xref.status.100.2">11.2</a></li>
     3526                  <li>100-continue (expect value)&nbsp;&nbsp;<a href="#rfc.iref.89"><b>10.3</b></a></li>
     3527                  <li>101 Switching Protocols (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.23"><b>7.1.2</b></a>, <a href="#rfc.xref.status.101.2">11.2</a></li>
    35153528               </ul>
    35163529            </li>
    35173530            <li><a id="rfc.index.2" href="#rfc.index.2"><b>2</b></a><ul>
    3518                   <li>200 OK (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.24"><b>7.2.1</b></a>, <a href="#rfc.xref.status.200.2">10.2</a></li>
    3519                   <li>201 Created (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.25"><b>7.2.2</b></a>, <a href="#rfc.xref.status.201.2">10.2</a></li>
    3520                   <li>202 Accepted (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.26"><b>7.2.3</b></a>, <a href="#rfc.xref.status.202.2">10.2</a></li>
    3521                   <li>203 Non-Authoritative Information (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.27"><b>7.2.4</b></a>, <a href="#rfc.xref.status.203.2">10.2</a>, <a href="#rfc.xref.status.203.3">A</a></li>
    3522                   <li>204 No Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.28"><b>7.2.5</b></a>, <a href="#rfc.xref.status.204.2">10.2</a></li>
    3523                   <li>205 Reset Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.29"><b>7.2.6</b></a>, <a href="#rfc.xref.status.205.2">10.2</a></li>
     3531                  <li>200 OK (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.24"><b>7.2.1</b></a>, <a href="#rfc.xref.status.200.2">11.2</a></li>
     3532                  <li>201 Created (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.25"><b>7.2.2</b></a>, <a href="#rfc.xref.status.201.2">11.2</a></li>
     3533                  <li>202 Accepted (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.26"><b>7.2.3</b></a>, <a href="#rfc.xref.status.202.2">11.2</a></li>
     3534                  <li>203 Non-Authoritative Information (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.27"><b>7.2.4</b></a>, <a href="#rfc.xref.status.203.2">11.2</a>, <a href="#rfc.xref.status.203.3">A</a></li>
     3535                  <li>204 No Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.28"><b>7.2.5</b></a>, <a href="#rfc.xref.status.204.2">11.2</a></li>
     3536                  <li>205 Reset Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.29"><b>7.2.6</b></a>, <a href="#rfc.xref.status.205.2">11.2</a></li>
    35243537               </ul>
    35253538            </li>
    35263539            <li><a id="rfc.index.3" href="#rfc.index.3"><b>3</b></a><ul>
    3527                   <li>300 Multiple Choices (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.30"><b>7.3.1</b></a>, <a href="#rfc.xref.status.300.2">10.2</a></li>
    3528                   <li>301 Moved Permanently (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.31"><b>7.3.2</b></a>, <a href="#rfc.xref.status.301.2">10.2</a>, <a href="#rfc.xref.status.301.3">A</a></li>
    3529                   <li>302 Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.32"><b>7.3.3</b></a>, <a href="#rfc.xref.status.302.2">10.2</a>, <a href="#rfc.xref.status.302.3">A</a></li>
    3530                   <li>303 See Other (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.33"><b>7.3.4</b></a>, <a href="#rfc.xref.status.303.2">10.2</a></li>
    3531                   <li>305 Use Proxy (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.34"><b>7.3.5</b></a>, <a href="#rfc.xref.status.305.2">10.2</a>, <a href="#rfc.xref.status.305.3">A</a></li>
    3532                   <li>306 (Unused) (status code)&nbsp;&nbsp;<a href="#rfc.iref.35"><b>7.3.6</b></a>, <a href="#rfc.xref.status.306.1">10.2</a></li>
    3533                   <li>307 Temporary Redirect (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.36"><b>7.3.7</b></a>, <a href="#rfc.xref.status.307.2">10.2</a>, <a href="#rfc.xref.status.307.3">A</a></li>
     3540                  <li>300 Multiple Choices (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.30"><b>7.3.1</b></a>, <a href="#rfc.xref.status.300.2">11.2</a></li>
     3541                  <li>301 Moved Permanently (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.31"><b>7.3.2</b></a>, <a href="#rfc.xref.status.301.2">11.2</a>, <a href="#rfc.xref.status.301.3">A</a></li>
     3542                  <li>302 Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.32"><b>7.3.3</b></a>, <a href="#rfc.xref.status.302.2">11.2</a>, <a href="#rfc.xref.status.302.3">A</a></li>
     3543                  <li>303 See Other (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.33"><b>7.3.4</b></a>, <a href="#rfc.xref.status.303.2">11.2</a></li>
     3544                  <li>305 Use Proxy (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.34"><b>7.3.5</b></a>, <a href="#rfc.xref.status.305.2">11.2</a>, <a href="#rfc.xref.status.305.3">A</a></li>
     3545                  <li>306 (Unused) (status code)&nbsp;&nbsp;<a href="#rfc.iref.35"><b>7.3.6</b></a>, <a href="#rfc.xref.status.306.1">11.2</a></li>
     3546                  <li>307 Temporary Redirect (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.36"><b>7.3.7</b></a>, <a href="#rfc.xref.status.307.2">11.2</a>, <a href="#rfc.xref.status.307.3">A</a></li>
    35343547               </ul>
    35353548            </li>
    35363549            <li><a id="rfc.index.4" href="#rfc.index.4"><b>4</b></a><ul>
    3537                   <li>400 Bad Request (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.37"><b>7.4.1</b></a>, <a href="#rfc.xref.status.400.2">10.2</a></li>
    3538                   <li>402 Payment Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.38"><b>7.4.2</b></a>, <a href="#rfc.xref.status.402.2">10.2</a></li>
    3539                   <li>403 Forbidden (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.39"><b>7.4.3</b></a>, <a href="#rfc.xref.status.403.2">10.2</a></li>
    3540                   <li>404 Not Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.40"><b>7.4.4</b></a>, <a href="#rfc.xref.status.404.2">10.2</a></li>
    3541                   <li>405 Method Not Allowed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.41"><b>7.4.5</b></a>, <a href="#rfc.xref.status.405.2">10.2</a></li>
    3542                   <li>406 Not Acceptable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.42"><b>7.4.6</b></a>, <a href="#rfc.xref.status.406.2">10.2</a></li>
    3543                   <li>408 Request Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.43"><b>7.4.7</b></a>, <a href="#rfc.xref.status.408.2">10.2</a></li>
    3544                   <li>409 Conflict (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.44"><b>7.4.8</b></a>, <a href="#rfc.xref.status.409.2">10.2</a></li>
    3545                   <li>410 Gone (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.45"><b>7.4.9</b></a>, <a href="#rfc.xref.status.410.2">10.2</a></li>
    3546                   <li>411 Length Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.46"><b>7.4.10</b></a>, <a href="#rfc.xref.status.411.2">10.2</a></li>
    3547                   <li>413 Request Representation Too Large (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.47"><b>7.4.11</b></a>, <a href="#rfc.xref.status.413.2">10.2</a></li>
    3548                   <li>414 URI Too Long (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.48"><b>7.4.12</b></a>, <a href="#rfc.xref.status.414.2">10.2</a></li>
    3549                   <li>415 Unsupported Media Type (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.49"><b>7.4.13</b></a>, <a href="#rfc.xref.status.415.2">10.2</a></li>
    3550                   <li>417 Expectation Failed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.50"><b>7.4.14</b></a>, <a href="#rfc.xref.status.417.2">10.2</a></li>
    3551                   <li>426 Upgrade Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.51"><b>7.4.15</b></a>, <a href="#rfc.xref.status.426.2">10.2</a>, <a href="#rfc.xref.status.426.3">A</a></li>
     3550                  <li>400 Bad Request (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.37"><b>7.4.1</b></a>, <a href="#rfc.xref.status.400.2">11.2</a></li>
     3551                  <li>402 Payment Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.38"><b>7.4.2</b></a>, <a href="#rfc.xref.status.402.2">11.2</a></li>
     3552                  <li>403 Forbidden (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.39"><b>7.4.3</b></a>, <a href="#rfc.xref.status.403.2">11.2</a></li>
     3553                  <li>404 Not Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.40"><b>7.4.4</b></a>, <a href="#rfc.xref.status.404.2">11.2</a></li>
     3554                  <li>405 Method Not Allowed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.41"><b>7.4.5</b></a>, <a href="#rfc.xref.status.405.2">11.2</a></li>
     3555                  <li>406 Not Acceptable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.42"><b>7.4.6</b></a>, <a href="#rfc.xref.status.406.2">11.2</a></li>
     3556                  <li>408 Request Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.43"><b>7.4.7</b></a>, <a href="#rfc.xref.status.408.2">11.2</a></li>
     3557                  <li>409 Conflict (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.44"><b>7.4.8</b></a>, <a href="#rfc.xref.status.409.2">11.2</a></li>
     3558                  <li>410 Gone (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.45"><b>7.4.9</b></a>, <a href="#rfc.xref.status.410.2">11.2</a></li>
     3559                  <li>411 Length Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.46"><b>7.4.10</b></a>, <a href="#rfc.xref.status.411.2">11.2</a></li>
     3560                  <li>413 Request Representation Too Large (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.47"><b>7.4.11</b></a>, <a href="#rfc.xref.status.413.2">11.2</a></li>
     3561                  <li>414 URI Too Long (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.48"><b>7.4.12</b></a>, <a href="#rfc.xref.status.414.2">11.2</a></li>
     3562                  <li>415 Unsupported Media Type (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.49"><b>7.4.13</b></a>, <a href="#rfc.xref.status.415.2">11.2</a></li>
     3563                  <li>417 Expectation Failed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.50"><b>7.4.14</b></a>, <a href="#rfc.xref.status.417.2">11.2</a></li>
     3564                  <li>426 Upgrade Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.51"><b>7.4.15</b></a>, <a href="#rfc.xref.status.426.2">11.2</a>, <a href="#rfc.xref.status.426.3">A</a></li>
    35523565               </ul>
    35533566            </li>
    35543567            <li><a id="rfc.index.5" href="#rfc.index.5"><b>5</b></a><ul>
    3555                   <li>500 Internal Server Error (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.52"><b>7.5.1</b></a>, <a href="#rfc.xref.status.500.2">10.2</a></li>
    3556                   <li>501 Not Implemented (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.53"><b>7.5.2</b></a>, <a href="#rfc.xref.status.501.2">10.2</a></li>
    3557                   <li>502 Bad Gateway (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.54"><b>7.5.3</b></a>, <a href="#rfc.xref.status.502.2">10.2</a></li>
    3558                   <li>503 Service Unavailable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.55"><b>7.5.4</b></a>, <a href="#rfc.xref.status.503.2">10.2</a></li>
    3559                   <li>504 Gateway Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.56"><b>7.5.5</b></a>, <a href="#rfc.xref.status.504.2">10.2</a></li>
    3560                   <li>505 HTTP Version Not Supported (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.57"><b>7.5.6</b></a>, <a href="#rfc.xref.status.505.2">10.2</a></li>
     3568                  <li>500 Internal Server Error (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.52"><b>7.5.1</b></a>, <a href="#rfc.xref.status.500.2">11.2</a></li>
     3569                  <li>501 Not Implemented (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.53"><b>7.5.2</b></a>, <a href="#rfc.xref.status.501.2">11.2</a></li>
     3570                  <li>502 Bad Gateway (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.54"><b>7.5.3</b></a>, <a href="#rfc.xref.status.502.2">11.2</a></li>
     3571                  <li>503 Service Unavailable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.55"><b>7.5.4</b></a>, <a href="#rfc.xref.status.503.2">11.2</a></li>
     3572                  <li>504 Gateway Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.56"><b>7.5.5</b></a>, <a href="#rfc.xref.status.504.2">11.2</a></li>
     3573                  <li>505 HTTP Version Not Supported (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.57"><b>7.5.6</b></a>, <a href="#rfc.xref.status.505.2">11.2</a></li>
    35613574               </ul>
    35623575            </li>
    35633576            <li><a id="rfc.index.A" href="#rfc.index.A"><b>A</b></a><ul>
    3564                   <li>Allow header field&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.a.1"><b>9.1</b></a>, <a href="#rfc.xref.header.allow.3">10.3</a>, <a href="#rfc.xref.header.allow.4">A</a></li>
     3577                  <li>Allow header field&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.a.1"><b>10.1</b></a>, <a href="#rfc.xref.header.allow.3">11.3</a>, <a href="#rfc.xref.header.allow.4">A</a></li>
    35653578               </ul>
    35663579            </li>
    35673580            <li><a id="rfc.index.C" href="#rfc.index.C"><b>C</b></a><ul>
    3568                   <li>CONNECT method&nbsp;&nbsp;<a href="#rfc.xref.CONNECT.1">2.1</a>, <a href="#rfc.iref.c.1"><b>6.9</b></a>, <a href="#rfc.xref.CONNECT.2">10.1</a>, <a href="#rfc.xref.CONNECT.3">A</a></li>
     3581                  <li>CONNECT method&nbsp;&nbsp;<a href="#rfc.xref.CONNECT.1">2.1</a>, <a href="#rfc.iref.c.1"><b>6.9</b></a>, <a href="#rfc.xref.CONNECT.2">11.1</a>, <a href="#rfc.xref.CONNECT.3">A</a></li>
    35693582               </ul>
    35703583            </li>
    35713584            <li><a id="rfc.index.D" href="#rfc.index.D"><b>D</b></a><ul>
    3572                   <li>Date header field&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.d.2"><b>9.2</b></a>, <a href="#rfc.xref.header.date.2">10.3</a></li>
    3573                   <li>DELETE method&nbsp;&nbsp;<a href="#rfc.xref.DELETE.1">2.1</a>, <a href="#rfc.iref.d.1"><b>6.7</b></a>, <a href="#rfc.xref.DELETE.2">10.1</a></li>
     3585                  <li>Date header field&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.d.2"><b>10.2</b></a>, <a href="#rfc.xref.header.date.2">11.3</a></li>
     3586                  <li>DELETE method&nbsp;&nbsp;<a href="#rfc.xref.DELETE.1">2.1</a>, <a href="#rfc.iref.d.1"><b>6.7</b></a>, <a href="#rfc.xref.DELETE.2">11.1</a></li>
    35743587               </ul>
    35753588            </li>
    35763589            <li><a id="rfc.index.E" href="#rfc.index.E"><b>E</b></a><ul>
    3577                   <li>Expect header field&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">7.4.14</a>, <a href="#rfc.iref.e.1"><b>9.3</b></a>, <a href="#rfc.xref.header.expect.3">10.3</a>, <a href="#rfc.xref.header.expect.4">A</a></li>
     3590                  <li>Expect header field&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">7.4.14</a>, <a href="#rfc.iref.e.1"><b>10.3</b></a>, <a href="#rfc.xref.header.expect.3">11.3</a>, <a href="#rfc.xref.header.expect.4">A</a></li>
    35783591                  <li>Expect Values&nbsp;&nbsp;
    35793592                     <ul>
    3580                         <li>100-continue&nbsp;&nbsp;<a href="#rfc.iref.e.2"><b>9.3</b></a></li>
     3593                        <li>100-continue&nbsp;&nbsp;<a href="#rfc.iref.e.2"><b>10.3</b></a></li>
    35813594                     </ul>
    35823595                  </li>
    … …  
    35843597            </li>
    35853598            <li><a id="rfc.index.F" href="#rfc.index.F"><b>F</b></a><ul>
    3586                   <li>From header field&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.f.1"><b>9.4</b></a>, <a href="#rfc.xref.header.from.2">10.3</a></li>
     3599                  <li>From header field&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.f.1"><b>10.4</b></a>, <a href="#rfc.xref.header.from.2">11.3</a></li>
    35873600               </ul>
    35883601            </li>
    35893602            <li><a id="rfc.index.G" href="#rfc.index.G"><b>G</b></a><ul>
    3590                   <li>GET method&nbsp;&nbsp;<a href="#rfc.xref.GET.1">2.1</a>, <a href="#rfc.iref.g.5"><b>6.3</b></a>, <a href="#rfc.xref.GET.2">10.1</a></li>
     3603                  <li>GET method&nbsp;&nbsp;<a href="#rfc.xref.GET.1">2.1</a>, <a href="#rfc.iref.g.5"><b>6.3</b></a>, <a href="#rfc.xref.GET.2">11.1</a></li>
    35913604                  <li><tt>Grammar</tt>&nbsp;&nbsp;
    35923605                     <ul>
    3593                         <li><tt>Allow</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.22"><b>9.1</b></a></li>
     3606                        <li><tt>Allow</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.24"><b>10.1</b></a></li>
    35943607                        <li><tt>asctime-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.21"><b>8</b></a></li>
    3595                         <li><tt>Date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.23"><b>9.2</b></a></li>
     3608                        <li><tt>Date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.25"><b>10.2</b></a></li>
    35963609                        <li><tt>date1</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.8"><b>8</b></a></li>
    35973610                        <li><tt>day</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.15"><b>8</b></a></li>
    35983611                        <li><tt>day-name</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.13"><b>8</b></a></li>
    35993612                        <li><tt>day-name-l</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.14"><b>8</b></a></li>
    3600                         <li><tt>delta-seconds</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.34"><b>9.8</b></a></li>
    3601                         <li><tt>Expect</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.24"><b>9.3</b></a></li>
    3602                         <li><tt>expect-name</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.28"><b>9.3</b></a></li>
    3603                         <li><tt>expect-param</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.26"><b>9.3</b></a></li>
    3604                         <li><tt>expect-value</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.27"><b>9.3</b></a></li>
    3605                         <li><tt>expectation</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.25"><b>9.3</b></a></li>
     3613                        <li><tt>delta-seconds</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.36"><b>10.8</b></a></li>
     3614                        <li><tt>Expect</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.26"><b>10.3</b></a></li>
     3615                        <li><tt>expect-name</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.30"><b>10.3</b></a></li>
     3616                        <li><tt>expect-param</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.28"><b>10.3</b></a></li>
     3617                        <li><tt>expect-value</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.29"><b>10.3</b></a></li>
     3618                        <li><tt>expectation</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.27"><b>10.3</b></a></li>
    36063619                        <li><tt>extension-code</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.3"><b>4</b></a></li>
    3607                         <li><tt>From</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.29"><b>9.4</b></a></li>
     3620                        <li><tt>From</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.31"><b>10.4</b></a></li>
    36083621                        <li><tt>GMT</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.18"><b>8</b></a></li>
    36093622                        <li><tt>hour</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.10"><b>8</b></a></li>
    36103623                        <li><tt>HTTP-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.6"><b>8</b></a></li>
    3611                         <li><tt>Location</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.30"><b>9.5</b></a></li>
    3612                         <li><tt>Max-Forwards</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.31"><b>9.6</b></a></li>
     3624                        <li><tt>Location</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.32"><b>10.5</b></a></li>
     3625                        <li><tt>Max-Forwards</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.33"><b>10.6</b></a></li>
    36133626                        <li><tt>Method</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.1"><b>2</b></a></li>
    36143627                        <li><tt>minute</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.11"><b>8</b></a></li>
    36153628                        <li><tt>month</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.16"><b>8</b></a></li>
    36163629                        <li><tt>obs-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.19"><b>8</b></a></li>
     3630                        <li><tt>product</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.22"><b>9</b></a></li>
     3631                        <li><tt>product-version</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.23"><b>9</b></a></li>
    36173632                        <li><tt>Reason-Phrase</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.4"><b>4</b></a></li>
    3618                         <li><tt>Referer</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.32"><b>9.7</b></a></li>
    3619                         <li><tt>Retry-After</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.33"><b>9.8</b></a></li>
     3633                        <li><tt>Referer</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.34"><b>10.7</b></a></li>
     3634                        <li><tt>Retry-After</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.35"><b>10.8</b></a></li>
    36203635                        <li><tt>rfc1123-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.7"><b>8</b></a></li>
    36213636                        <li><tt>rfc850-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.20"><b>8</b></a></li>
    36223637                        <li><tt>second</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.12"><b>8</b></a></li>
    3623                         <li><tt>Server</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.35"><b>9.9</b></a></li>
     3638                        <li><tt>Server</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.37"><b>10.9</b></a></li>
    36243639                        <li><tt>Status-Code</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.2"><b>4</b></a></li>
    36253640                        <li><tt>time-of-day</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.9"><b>8</b></a></li>
    3626                         <li><tt>User-Agent</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.36"><b>9.10</b></a></li>
     3641                        <li><tt>User-Agent</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.38"><b>10.10</b></a></li>
    36273642                        <li><tt>year</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.17"><b>8</b></a></li>
    36283643                     </ul>
    … …  
    36313646            </li>
    36323647            <li><a id="rfc.index.H" href="#rfc.index.H"><b>H</b></a><ul>
    3633                   <li>HEAD method&nbsp;&nbsp;<a href="#rfc.xref.HEAD.1">2.1</a>, <a href="#rfc.iref.h.1"><b>6.4</b></a>, <a href="#rfc.xref.HEAD.2">10.1</a></li>
     3648                  <li>HEAD method&nbsp;&nbsp;<a href="#rfc.xref.HEAD.1">2.1</a>, <a href="#rfc.iref.h.1"><b>6.4</b></a>, <a href="#rfc.xref.HEAD.2">11.1</a></li>
    36343649                  <li>Header Fields&nbsp;&nbsp;
    36353650                     <ul>
    3636                         <li>Allow&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.h.2"><b>9.1</b></a>, <a href="#rfc.xref.header.allow.3">10.3</a>, <a href="#rfc.xref.header.allow.4">A</a></li>
    3637                         <li>Date&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.h.3"><b>9.2</b></a>, <a href="#rfc.xref.header.date.2">10.3</a></li>
    3638                         <li>Expect&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">7.4.14</a>, <a href="#rfc.iref.h.4"><b>9.3</b></a>, <a href="#rfc.xref.header.expect.3">10.3</a>, <a href="#rfc.xref.header.expect.4">A</a></li>
    3639                         <li>From&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.h.5"><b>9.4</b></a>, <a href="#rfc.xref.header.from.2">10.3</a></li>
    3640                         <li>Location&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">3.3</a>, <a href="#rfc.xref.header.location.2">6.5</a>, <a href="#rfc.xref.header.location.3">7.3</a>, <a href="#rfc.iref.h.6"><b>9.5</b></a>, <a href="#rfc.xref.header.location.4">10.3</a>, <a href="#rfc.xref.header.location.5">A</a></li>
    3641                         <li>Max-Forwards&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">3.2</a>, <a href="#rfc.xref.header.max-forwards.2">6.2</a>, <a href="#rfc.xref.header.max-forwards.3">6.8</a>, <a href="#rfc.iref.h.7"><b>9.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">10.3</a>, <a href="#rfc.xref.header.max-forwards.5">A</a></li>
    3642                         <li>Referer&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.h.8"><b>9.7</b></a>, <a href="#rfc.xref.header.referer.2">10.3</a>, <a href="#rfc.xref.header.referer.3">A</a></li>
    3643                         <li>Retry-After&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">7.5.4</a>, <a href="#rfc.iref.h.9"><b>9.8</b></a>, <a href="#rfc.xref.header.retry-after.3">10.3</a></li>
    3644                         <li>Server&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.h.10"><b>9.9</b></a>, <a href="#rfc.xref.header.server.2">10.3</a>, <a href="#rfc.xref.header.server.3">11.1</a>, <a href="#rfc.xref.header.server.4">A</a></li>
    3645                         <li>User-Agent&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.iref.h.11"><b>9.10</b></a>, <a href="#rfc.xref.header.user-agent.2">10.3</a>, <a href="#rfc.xref.header.user-agent.3">11.1</a></li>
     3651                        <li>Allow&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.h.2"><b>10.1</b></a>, <a href="#rfc.xref.header.allow.3">11.3</a>, <a href="#rfc.xref.header.allow.4">A</a></li>
     3652                        <li>Date&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.h.3"><b>10.2</b></a>, <a href="#rfc.xref.header.date.2">11.3</a></li>
     3653                        <li>Expect&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">7.4.14</a>, <a href="#rfc.iref.h.4"><b>10.3</b></a>, <a href="#rfc.xref.header.expect.3">11.3</a>, <a href="#rfc.xref.header.expect.4">A</a></li>
     3654                        <li>From&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.h.5"><b>10.4</b></a>, <a href="#rfc.xref.header.from.2">11.3</a></li>
     3655                        <li>Location&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">3.3</a>, <a href="#rfc.xref.header.location.2">6.5</a>, <a href="#rfc.xref.header.location.3">7.3</a>, <a href="#rfc.iref.h.6"><b>10.5</b></a>, <a href="#rfc.xref.header.location.4">11.3</a>, <a href="#rfc.xref.header.location.5">A</a></li>
     3656                        <li>Max-Forwards&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">3.2</a>, <a href="#rfc.xref.header.max-forwards.2">6.2</a>, <a href="#rfc.xref.header.max-forwards.3">6.8</a>, <a href="#rfc.iref.h.7"><b>10.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">11.3</a>, <a href="#rfc.xref.header.max-forwards.5">A</a></li>
     3657                        <li>Referer&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.h.8"><b>10.7</b></a>, <a href="#rfc.xref.header.referer.2">11.3</a>, <a href="#rfc.xref.header.referer.3">A</a></li>
     3658                        <li>Retry-After&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">7.5.4</a>, <a href="#rfc.iref.h.9"><b>10.8</b></a>, <a href="#rfc.xref.header.retry-after.3">11.3</a></li>
     3659                        <li>Server&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.h.10"><b>10.9</b></a>, <a href="#rfc.xref.header.server.2">11.3</a>, <a href="#rfc.xref.header.server.3">12.1</a>, <a href="#rfc.xref.header.server.4">A</a></li>
     3660                        <li>User-Agent&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.iref.h.11"><b>10.10</b></a>, <a href="#rfc.xref.header.user-agent.2">11.3</a>, <a href="#rfc.xref.header.user-agent.3">12.1</a></li>
    36463661                     </ul>
    36473662                  </li>
    … …  
    36533668            </li>
    36543669            <li><a id="rfc.index.L" href="#rfc.index.L"><b>L</b></a><ul>
    3655                   <li>Location header field&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">3.3</a>, <a href="#rfc.xref.header.location.2">6.5</a>, <a href="#rfc.xref.header.location.3">7.3</a>, <a href="#rfc.iref.l.1"><b>9.5</b></a>, <a href="#rfc.xref.header.location.4">10.3</a>, <a href="#rfc.xref.header.location.5">A</a></li>
     3670                  <li>Location header field&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">3.3</a>, <a href="#rfc.xref.header.location.2">6.5</a>, <a href="#rfc.xref.header.location.3">7.3</a>, <a href="#rfc.iref.l.1"><b>10.5</b></a>, <a href="#rfc.xref.header.location.4">11.3</a>, <a href="#rfc.xref.header.location.5">A</a></li>
    36563671               </ul>
    36573672            </li>
    36583673            <li><a id="rfc.index.M" href="#rfc.index.M"><b>M</b></a><ul>
    3659                   <li>Max-Forwards header field&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">3.2</a>, <a href="#rfc.xref.header.max-forwards.2">6.2</a>, <a href="#rfc.xref.header.max-forwards.3">6.8</a>, <a href="#rfc.iref.m.9"><b>9.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">10.3</a>, <a href="#rfc.xref.header.max-forwards.5">A</a></li>
     3674                  <li>Max-Forwards header field&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">3.2</a>, <a href="#rfc.xref.header.max-forwards.2">6.2</a>, <a href="#rfc.xref.header.max-forwards.3">6.8</a>, <a href="#rfc.iref.m.9"><b>10.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">11.3</a>, <a href="#rfc.xref.header.max-forwards.5">A</a></li>
    36603675                  <li>Methods&nbsp;&nbsp;
    36613676                     <ul>
    3662                         <li>CONNECT&nbsp;&nbsp;<a href="#rfc.xref.CONNECT.1">2.1</a>, <a href="#rfc.iref.m.8"><b>6.9</b></a>, <a href="#rfc.xref.CONNECT.2">10.1</a>, <a href="#rfc.xref.CONNECT.3">A</a></li>
    3663                         <li>DELETE&nbsp;&nbsp;<a href="#rfc.xref.DELETE.1">2.1</a>, <a href="#rfc.iref.m.6"><b>6.7</b></a>, <a href="#rfc.xref.DELETE.2">10.1</a></li>
    3664                         <li>GET&nbsp;&nbsp;<a href="#rfc.xref.GET.1">2.1</a>, <a href="#rfc.iref.m.2"><b>6.3</b></a>, <a href="#rfc.xref.GET.2">10.1</a></li>
    3665                         <li>HEAD&nbsp;&nbsp;<a href="#rfc.xref.HEAD.1">2.1</a>, <a href="#rfc.iref.m.3"><b>6.4</b></a>, <a href="#rfc.xref.HEAD.2">10.1</a></li>
    3666                         <li>OPTIONS&nbsp;&nbsp;<a href="#rfc.xref.OPTIONS.1">2.1</a>, <a href="#rfc.iref.m.1"><b>6.2</b></a>, <a href="#rfc.xref.OPTIONS.2">9.6</a>, <a href="#rfc.xref.OPTIONS.3">10.1</a></li>
    3667                         <li>POST&nbsp;&nbsp;<a href="#rfc.xref.POST.1">2.1</a>, <a href="#rfc.iref.m.4"><b>6.5</b></a>, <a href="#rfc.xref.POST.2">10.1</a>, <a href="#rfc.xref.POST.3">A</a></li>
    3668                         <li>PUT&nbsp;&nbsp;<a href="#rfc.xref.PUT.1">2.1</a>, <a href="#rfc.iref.m.5"><b>6.6</b></a>, <a href="#rfc.xref.PUT.2">10.1</a>, <a href="#rfc.xref.PUT.3">A</a></li>
    3669                         <li>TRACE&nbsp;&nbsp;<a href="#rfc.xref.TRACE.1">2.1</a>, <a href="#rfc.iref.m.7"><b>6.8</b></a>, <a href="#rfc.xref.TRACE.2">9.6</a>, <a href="#rfc.xref.TRACE.3">10.1</a>, <a href="#rfc.xref.TRACE.4">11.1</a></li>
     3677                        <li>CONNECT&nbsp;&nbsp;<a href="#rfc.xref.CONNECT.1">2.1</a>, <a href="#rfc.iref.m.8"><b>6.9</b></a>, <a href="#rfc.xref.CONNECT.2">11.1</a>, <a href="#rfc.xref.CONNECT.3">A</a></li>
     3678                        <li>DELETE&nbsp;&nbsp;<a href="#rfc.xref.DELETE.1">2.1</a>, <a href="#rfc.iref.m.6"><b>6.7</b></a>, <a href="#rfc.xref.DELETE.2">11.1</a></li>
     3679                        <li>GET&nbsp;&nbsp;<a href="#rfc.xref.GET.1">2.1</a>, <a href="#rfc.iref.m.2"><b>6.3</b></a>, <a href="#rfc.xref.GET.2">11.1</a></li>
     3680                        <li>HEAD&nbsp;&nbsp;<a href="#rfc.xref.HEAD.1">2.1</a>, <a href="#rfc.iref.m.3"><b>6.4</b></a>, <a href="#rfc.xref.HEAD.2">11.1</a></li>
     3681                        <li>OPTIONS&nbsp;&nbsp;<a href="#rfc.xref.OPTIONS.1">2.1</a>, <a href="#rfc.iref.m.1"><b>6.2</b></a>, <a href="#rfc.xref.OPTIONS.2">10.6</a>, <a href="#rfc.xref.OPTIONS.3">11.1</a></li>
     3682                        <li>POST&nbsp;&nbsp;<a href="#rfc.xref.POST.1">2.1</a>, <a href="#rfc.iref.m.4"><b>6.5</b></a>, <a href="#rfc.xref.POST.2">11.1</a>, <a href="#rfc.xref.POST.3">A</a></li>
     3683                        <li>PUT&nbsp;&nbsp;<a href="#rfc.xref.PUT.1">2.1</a>, <a href="#rfc.iref.m.5"><b>6.6</b></a>, <a href="#rfc.xref.PUT.2">11.1</a>, <a href="#rfc.xref.PUT.3">A</a></li>
     3684                        <li>TRACE&nbsp;&nbsp;<a href="#rfc.xref.TRACE.1">2.1</a>, <a href="#rfc.iref.m.7"><b>6.8</b></a>, <a href="#rfc.xref.TRACE.2">10.6</a>, <a href="#rfc.xref.TRACE.3">11.1</a>, <a href="#rfc.xref.TRACE.4">12.1</a></li>
    36703685                     </ul>
    36713686                  </li>
    … …  
    36733688            </li>
    36743689            <li><a id="rfc.index.O" href="#rfc.index.O"><b>O</b></a><ul>
    3675                   <li>OPTIONS method&nbsp;&nbsp;<a href="#rfc.xref.OPTIONS.1">2.1</a>, <a href="#rfc.iref.o.1"><b>6.2</b></a>, <a href="#rfc.xref.OPTIONS.2">9.6</a>, <a href="#rfc.xref.OPTIONS.3">10.1</a></li>
     3690                  <li>OPTIONS method&nbsp;&nbsp;<a href="#rfc.xref.OPTIONS.1">2.1</a>, <a href="#rfc.iref.o.1"><b>6.2</b></a>, <a href="#rfc.xref.OPTIONS.2">10.6</a>, <a href="#rfc.xref.OPTIONS.3">11.1</a></li>
    36763691               </ul>
    36773692            </li>
    36783693            <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul>
    3679                   <li><em>Part1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.1">1</a>, <a href="#rfc.xref.Part1.2">1.1</a>, <a href="#rfc.xref.Part1.3">1.2</a>, <a href="#rfc.xref.Part1.4">1.2.1</a>, <a href="#rfc.xref.Part1.5">1.2.1</a>, <a href="#rfc.xref.Part1.6">1.2.1</a>, <a href="#rfc.xref.Part1.7">1.2.1</a>, <a href="#rfc.xref.Part1.8">1.2.1</a>, <a href="#rfc.xref.Part1.9">1.2.1</a>, <a href="#rfc.xref.Part1.10">1.2.1</a>, <a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.14">1.2.2</a>, <a href="#rfc.xref.Part1.15">1.2.2</a>, <a href="#rfc.xref.Part1.16">2</a>, <a href="#rfc.xref.Part1.17">2.2.1</a>, <a href="#rfc.xref.Part1.18">3</a>, <a href="#rfc.xref.Part1.19">3.1</a>, <a href="#rfc.xref.Part1.20">3.1</a>, <a href="#rfc.xref.Part1.21">3.1</a>, <a href="#rfc.xref.Part1.22">3.1</a>, <a href="#rfc.xref.Part1.23">3.1</a>, <a href="#rfc.xref.Part1.24">3.2</a>, <a href="#rfc.xref.Part1.25">3.2</a>, <a href="#rfc.xref.Part1.26">3.3</a>, <a href="#rfc.xref.Part1.27">5</a>, <a href="#rfc.xref.Part1.28">5.1</a>, <a href="#rfc.xref.Part1.29">6.8</a>, <a href="#rfc.xref.Part1.30">6.8</a>, <a href="#rfc.xref.Part1.31">6.9</a>, <a href="#rfc.xref.Part1.32">7.1.1</a>, <a href="#rfc.xref.Part1.33">7.1.2</a>, <a href="#rfc.xref.Part1.34">7.2.4</a>, <a href="#rfc.xref.Part1.35">7.2.6</a>, <a href="#rfc.xref.Part1.36">7.4.15</a>, <a href="#rfc.xref.Part1.37">7.5.6</a>, <a href="#rfc.xref.Part1.38">9.3</a>, <a href="#rfc.xref.Part1.39">9.9</a>, <a href="#rfc.xref.Part1.40">9.9</a>, <a href="#rfc.xref.Part1.41">9.9</a>, <a href="#rfc.xref.Part1.42">9.10</a>, <a href="#rfc.xref.Part1.43">9.10</a>, <a href="#rfc.xref.Part1.44">12</a>, <a href="#Part1"><b>13.1</b></a>, <a href="#rfc.xref.Part1.45">A</a><ul>
     3694                  <li><em>Part1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.1">1</a>, <a href="#rfc.xref.Part1.2">1.1</a>, <a href="#rfc.xref.Part1.3">1.2</a>, <a href="#rfc.xref.Part1.4">1.2.1</a>, <a href="#rfc.xref.Part1.5">1.2.1</a>, <a href="#rfc.xref.Part1.6">1.2.1</a>, <a href="#rfc.xref.Part1.7">1.2.1</a>, <a href="#rfc.xref.Part1.8">1.2.1</a>, <a href="#rfc.xref.Part1.9">1.2.1</a>, <a href="#rfc.xref.Part1.10">1.2.1</a>, <a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.14">1.2.2</a>, <a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.17">3</a>, <a href="#rfc.xref.Part1.18">3.1</a>, <a href="#rfc.xref.Part1.19">3.1</a>, <a href="#rfc.xref.Part1.20">3.1</a>, <a href="#rfc.xref.Part1.21">3.1</a>, <a href="#rfc.xref.Part1.22">3.1</a>, <a href="#rfc.xref.Part1.23">3.2</a>, <a href="#rfc.xref.Part1.24">3.2</a>, <a href="#rfc.xref.Part1.25">3.3</a>, <a href="#rfc.xref.Part1.26">5</a>, <a href="#rfc.xref.Part1.27">5.1</a>, <a href="#rfc.xref.Part1.28">6.8</a>, <a href="#rfc.xref.Part1.29">6.8</a>, <a href="#rfc.xref.Part1.30">6.9</a>, <a href="#rfc.xref.Part1.31">7.1.1</a>, <a href="#rfc.xref.Part1.32">7.1.2</a>, <a href="#rfc.xref.Part1.33">7.2.4</a>, <a href="#rfc.xref.Part1.34">7.2.6</a>, <a href="#rfc.xref.Part1.35">7.4.15</a>, <a href="#rfc.xref.Part1.36">7.5.6</a>, <a href="#rfc.xref.Part1.37">10.3</a>, <a href="#rfc.xref.Part1.38">10.9</a>, <a href="#rfc.xref.Part1.39">10.9</a>, <a href="#rfc.xref.Part1.40">10.10</a>, <a href="#rfc.xref.Part1.41">13</a>, <a href="#Part1"><b>14.1</b></a>, <a href="#rfc.xref.Part1.42">A</a><ul>
    36803695                        <li><em>Section 1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.3">1.2</a></li>
    36813696                        <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.2">1.1</a></li>
    3682                         <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.34">7.2.4</a></li>
    3683                         <li><em>Section 2.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.37">7.5.6</a></li>
    3684                         <li><em>Section 2.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.15">1.2.2</a></li>
    3685                         <li><em>Section 3.1.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.31">6.9</a></li>
     3697                        <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.33">7.2.4</a></li>
     3698                        <li><em>Section 2.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.36">7.5.6</a></li>
     3699                        <li><em>Section 2.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.14">1.2.2</a></li>
     3700                        <li><em>Section 3.1.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.30">6.9</a></li>
    36863701                        <li><em>Section 3.2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.5">1.2.1</a>, <a href="#rfc.xref.Part1.6">1.2.1</a>, <a href="#rfc.xref.Part1.7">1.2.1</a></li>
    3687                         <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.18">3</a>, <a href="#rfc.xref.Part1.21">3.1</a>, <a href="#rfc.xref.Part1.40">9.9</a>, <a href="#rfc.xref.Part1.43">9.10</a></li>
    3688                         <li><em>Section 3.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.8">1.2.1</a>, <a href="#rfc.xref.Part1.9">1.2.1</a>, <a href="#rfc.xref.Part1.10">1.2.1</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.20">3.1</a></li>
    3689                         <li><em>Section 3.2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.19">3.1</a></li>
    3690                         <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.17">2.2.1</a>, <a href="#rfc.xref.Part1.27">5</a>, <a href="#rfc.xref.Part1.35">7.2.6</a></li>
    3691                         <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.16">2</a>, <a href="#rfc.xref.Part1.26">3.3</a>, <a href="#rfc.xref.Part1.28">5.1</a></li>
    3692                         <li><em>Section 5.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.23">3.1</a></li>
    3693                         <li><em>Section 5.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.14">1.2.2</a>, <a href="#rfc.xref.Part1.39">9.9</a>, <a href="#rfc.xref.Part1.42">9.10</a></li>
    3694                         <li><em>Section 6.2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.32">7.1.1</a>, <a href="#rfc.xref.Part1.38">9.3</a></li>
    3695                         <li><em>Section 8.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.22">3.1</a></li>
    3696                         <li><em>Section 8.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.24">3.2</a></li>
    3697                         <li><em>Section 8.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.25">3.2</a></li>
    3698                         <li><em>Section 8.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.33">7.1.2</a>, <a href="#rfc.xref.Part1.36">7.4.15</a></li>
    3699                         <li><em>Section 8.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.29">6.8</a>, <a href="#rfc.xref.Part1.41">9.9</a>, <a href="#rfc.xref.Part1.45">A</a></li>
    3700                         <li><em>Section 9.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.30">6.8</a></li>
    3701                         <li><em>Section 11</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.44">12</a></li>
     3702                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.17">3</a>, <a href="#rfc.xref.Part1.20">3.1</a>, <a href="#rfc.xref.Part1.38">10.9</a>, <a href="#rfc.xref.Part1.40">10.10</a></li>
     3703                        <li><em>Section 3.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.8">1.2.1</a>, <a href="#rfc.xref.Part1.9">1.2.1</a>, <a href="#rfc.xref.Part1.10">1.2.1</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.19">3.1</a></li>
     3704                        <li><em>Section 3.2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.18">3.1</a></li>
     3705                        <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.26">5</a>, <a href="#rfc.xref.Part1.34">7.2.6</a></li>
     3706                        <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.25">3.3</a>, <a href="#rfc.xref.Part1.27">5.1</a></li>
     3707                        <li><em>Section 5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.22">3.1</a></li>
     3708                        <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.24">3.2</a></li>
     3709                        <li><em>Section 7.2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.31">7.1.1</a>, <a href="#rfc.xref.Part1.37">10.3</a></li>
     3710                        <li><em>Section 9.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.21">3.1</a></li>
     3711                        <li><em>Section 9.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.23">3.2</a></li>
     3712                        <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.32">7.1.2</a>, <a href="#rfc.xref.Part1.35">7.4.15</a></li>
     3713                        <li><em>Section 9.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.28">6.8</a>, <a href="#rfc.xref.Part1.39">10.9</a>, <a href="#rfc.xref.Part1.42">A</a></li>
     3714                        <li><em>Section 10.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.29">6.8</a></li>
     3715                        <li><em>Section 12</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.41">13</a></li>
    37023716                     </ul>
    37033717                  </li>
    3704                   <li><em>Part3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">3.1</a>, <a href="#rfc.xref.Part3.2">3.1</a>, <a href="#rfc.xref.Part3.3">3.2</a>, <a href="#rfc.xref.Part3.4">3.2</a>, <a href="#rfc.xref.Part3.5">3.2</a>, <a href="#rfc.xref.Part3.6">3.2</a>, <a href="#rfc.xref.Part3.7">5</a>, <a href="#rfc.xref.Part3.8">6.5</a>, <a href="#rfc.xref.Part3.9">7</a>, <a href="#rfc.xref.Part3.10">7.3</a>, <a href="#rfc.xref.Part3.11">7.3.1</a>, <a href="#rfc.xref.Part3.12">7.4.6</a>, <a href="#rfc.xref.Part3.13">9.5</a>, <a href="#Part3"><b>13.1</b></a><ul>
     3718                  <li><em>Part3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">3.1</a>, <a href="#rfc.xref.Part3.2">3.1</a>, <a href="#rfc.xref.Part3.3">3.2</a>, <a href="#rfc.xref.Part3.4">3.2</a>, <a href="#rfc.xref.Part3.5">3.2</a>, <a href="#rfc.xref.Part3.6">3.2</a>, <a href="#rfc.xref.Part3.7">5</a>, <a href="#rfc.xref.Part3.8">6.5</a>, <a href="#rfc.xref.Part3.9">7</a>, <a href="#rfc.xref.Part3.10">7.3</a>, <a href="#rfc.xref.Part3.11">7.3.1</a>, <a href="#rfc.xref.Part3.12">7.4.6</a>, <a href="#rfc.xref.Part3.13">10.5</a>, <a href="#Part3"><b>14.1</b></a><ul>
    37053719                        <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.2">3.1</a></li>
    37063720                        <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.11">7.3.1</a></li>
    … …  
    37113725                        <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.5">3.2</a></li>
    37123726                        <li><em>Section 6.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.6">3.2</a></li>
    3713                         <li><em>Section 6.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.8">6.5</a>, <a href="#rfc.xref.Part3.13">9.5</a></li>
     3727                        <li><em>Section 6.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.8">6.5</a>, <a href="#rfc.xref.Part3.13">10.5</a></li>
    37143728                        <li><em>Section 6.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">3.1</a>, <a href="#rfc.xref.Part3.9">7</a></li>
    37153729                     </ul>
    37163730                  </li>
    3717                   <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.2</a>, <a href="#rfc.xref.Part4.2">3.2</a>, <a href="#rfc.xref.Part4.3">3.2</a>, <a href="#rfc.xref.Part4.4">3.2</a>, <a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.6">4.1</a>, <a href="#rfc.xref.Part4.7">4.1</a>, <a href="#rfc.xref.Part4.8">4.1</a>, <a href="#rfc.xref.Part4.9">7.2.2</a>, <a href="#rfc.xref.Part4.10">7.3</a>, <a href="#Part4"><b>13.1</b></a>, <a href="#rfc.xref.Part4.11">C.2</a><ul>
     3731                  <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.2</a>, <a href="#rfc.xref.Part4.2">3.2</a>, <a href="#rfc.xref.Part4.3">3.2</a>, <a href="#rfc.xref.Part4.4">3.2</a>, <a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.6">4.1</a>, <a href="#rfc.xref.Part4.7">4.1</a>, <a href="#rfc.xref.Part4.8">4.1</a>, <a href="#rfc.xref.Part4.9">7.2.2</a>, <a href="#rfc.xref.Part4.10">7.3</a>, <a href="#Part4"><b>14.1</b></a>, <a href="#rfc.xref.Part4.11">C.2</a><ul>
    37183732                        <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.9">7.2.2</a></li>
    37193733                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.2</a></li>
    … …  
    37263740                     </ul>
    37273741                  </li>
    3728                   <li><em>Part5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">3.2</a>, <a href="#rfc.xref.Part5.2">3.2</a>, <a href="#rfc.xref.Part5.3">3.3</a>, <a href="#rfc.xref.Part5.4">4.1</a>, <a href="#rfc.xref.Part5.5">4.1</a>, <a href="#rfc.xref.Part5.6">4.1</a>, <a href="#rfc.xref.Part5.7">6.3</a>, <a href="#Part5"><b>13.1</b></a><ul>
     3742                  <li><em>Part5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">3.2</a>, <a href="#rfc.xref.Part5.2">3.2</a>, <a href="#rfc.xref.Part5.3">3.3</a>, <a href="#rfc.xref.Part5.4">4.1</a>, <a href="#rfc.xref.Part5.5">4.1</a>, <a href="#rfc.xref.Part5.6">4.1</a>, <a href="#rfc.xref.Part5.7">6.3</a>, <a href="#Part5"><b>14.1</b></a><ul>
    37293743                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.4">4.1</a></li>
    37303744                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.5">4.1</a></li>
    … …  
    37353749                     </ul>
    37363750                  </li>
    3737                   <li><em>Part6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">2.2.1</a>, <a href="#rfc.xref.Part6.2">3.1</a>, <a href="#rfc.xref.Part6.3">3.3</a>, <a href="#rfc.xref.Part6.4">3.3</a>, <a href="#rfc.xref.Part6.5">4.2.1</a>, <a href="#rfc.xref.Part6.6">6.3</a>, <a href="#rfc.xref.Part6.7">6.4</a>, <a href="#rfc.xref.Part6.8">6.5</a>, <a href="#rfc.xref.Part6.9">6.6</a>, <a href="#rfc.xref.Part6.10">6.7</a>, <a href="#rfc.xref.Part6.11">7.2.1</a>, <a href="#rfc.xref.Part6.12">7.2.4</a>, <a href="#rfc.xref.Part6.13">7.2.4</a>, <a href="#rfc.xref.Part6.14">7.2.4</a>, <a href="#rfc.xref.Part6.15">7.3.1</a>, <a href="#rfc.xref.Part6.16">7.3.2</a>, <a href="#rfc.xref.Part6.17">7.4.9</a>, <a href="#Part6"><b>13.1</b></a><ul>
     3751                  <li><em>Part6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">2.2.1</a>, <a href="#rfc.xref.Part6.2">3.1</a>, <a href="#rfc.xref.Part6.3">3.3</a>, <a href="#rfc.xref.Part6.4">3.3</a>, <a href="#rfc.xref.Part6.5">4.2.1</a>, <a href="#rfc.xref.Part6.6">6.3</a>, <a href="#rfc.xref.Part6.7">6.4</a>, <a href="#rfc.xref.Part6.8">6.5</a>, <a href="#rfc.xref.Part6.9">6.6</a>, <a href="#rfc.xref.Part6.10">6.7</a>, <a href="#rfc.xref.Part6.11">7.2.1</a>, <a href="#rfc.xref.Part6.12">7.2.4</a>, <a href="#rfc.xref.Part6.13">7.2.4</a>, <a href="#rfc.xref.Part6.14">7.2.4</a>, <a href="#rfc.xref.Part6.15">7.3.1</a>, <a href="#rfc.xref.Part6.16">7.3.2</a>, <a href="#rfc.xref.Part6.17">7.4.9</a>, <a href="#Part6"><b>14.1</b></a><ul>
    37383752                        <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.8">6.5</a></li>
    37393753                        <li><em>Section 2.3.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.11">7.2.1</a>, <a href="#rfc.xref.Part6.14">7.2.4</a>, <a href="#rfc.xref.Part6.15">7.3.1</a>, <a href="#rfc.xref.Part6.16">7.3.2</a>, <a href="#rfc.xref.Part6.17">7.4.9</a></li>
    … …  
    37453759                     </ul>
    37463760                  </li>
    3747                   <li><em>Part7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">3.2</a>, <a href="#rfc.xref.Part7.2">3.2</a>, <a href="#rfc.xref.Part7.3">3.3</a>, <a href="#rfc.xref.Part7.4">3.3</a>, <a href="#rfc.xref.Part7.5">4.1</a>, <a href="#rfc.xref.Part7.6">4.1</a>, <a href="#rfc.xref.Part7.7">4.1</a>, <a href="#Part7"><b>13.1</b></a><ul>
     3761                  <li><em>Part7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">3.2</a>, <a href="#rfc.xref.Part7.2">3.2</a>, <a href="#rfc.xref.Part7.3">3.3</a>, <a href="#rfc.xref.Part7.4">3.3</a>, <a href="#rfc.xref.Part7.5">4.1</a>, <a href="#rfc.xref.Part7.6">4.1</a>, <a href="#rfc.xref.Part7.7">4.1</a>, <a href="#Part7"><b>14.1</b></a><ul>
    37483762                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.5">4.1</a></li>
    37493763                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.6">4.1</a></li>
    … …  
    37553769                     </ul>
    37563770                  </li>
    3757                   <li>POST method&nbsp;&nbsp;<a href="#rfc.xref.POST.1">2.1</a>, <a href="#rfc.iref.p.1"><b>6.5</b></a>, <a href="#rfc.xref.POST.2">10.1</a>, <a href="#rfc.xref.POST.3">A</a></li>
    3758                   <li>PUT method&nbsp;&nbsp;<a href="#rfc.xref.PUT.1">2.1</a>, <a href="#rfc.iref.p.2"><b>6.6</b></a>, <a href="#rfc.xref.PUT.2">10.1</a>, <a href="#rfc.xref.PUT.3">A</a></li>
     3771                  <li>POST method&nbsp;&nbsp;<a href="#rfc.xref.POST.1">2.1</a>, <a href="#rfc.iref.p.1"><b>6.5</b></a>, <a href="#rfc.xref.POST.2">11.1</a>, <a href="#rfc.xref.POST.3">A</a></li>
     3772                  <li>PUT method&nbsp;&nbsp;<a href="#rfc.xref.PUT.1">2.1</a>, <a href="#rfc.iref.p.2"><b>6.6</b></a>, <a href="#rfc.xref.PUT.2">11.1</a>, <a href="#rfc.xref.PUT.3">A</a></li>
    37593773               </ul>
    37603774            </li>
    37613775            <li><a id="rfc.index.R" href="#rfc.index.R"><b>R</b></a><ul>
    3762                   <li>Referer header field&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.r.1"><b>9.7</b></a>, <a href="#rfc.xref.header.referer.2">10.3</a>, <a href="#rfc.xref.header.referer.3">A</a></li>
    3763                   <li>Retry-After header field&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">7.5.4</a>, <a href="#rfc.iref.r.2"><b>9.8</b></a>, <a href="#rfc.xref.header.retry-after.3">10.3</a></li>
    3764                   <li><em>RFC1123</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1123.1">8</a>, <a href="#rfc.xref.RFC1123.2">8</a>, <a href="#RFC1123"><b>13.2</b></a><ul>
     3776                  <li>Referer header field&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.r.1"><b>10.7</b></a>, <a href="#rfc.xref.header.referer.2">11.3</a>, <a href="#rfc.xref.header.referer.3">A</a></li>
     3777                  <li>Retry-After header field&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">7.5.4</a>, <a href="#rfc.iref.r.2"><b>10.8</b></a>, <a href="#rfc.xref.header.retry-after.3">11.3</a></li>
     3778                  <li><em>RFC1123</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1123.1">8</a>, <a href="#rfc.xref.RFC1123.2">8</a>, <a href="#RFC1123"><b>14.2</b></a><ul>
    37653779                        <li><em>Section 5.2.14</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1123.2">8</a></li>
    37663780                     </ul>
    37673781                  </li>
    3768                   <li><em>RFC1945</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1945.1">7.3</a>, <a href="#RFC1945"><b>13.2</b></a><ul>
     3782                  <li><em>RFC1945</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1945.1">7.3</a>, <a href="#RFC1945"><b>14.2</b></a><ul>
    37693783                        <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1945.1">7.3</a></li>
    37703784                     </ul>
    37713785                  </li>
    3772                   <li><em>RFC2068</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.1">7.3</a>, <a href="#rfc.xref.RFC2068.2">7.3</a>, <a href="#RFC2068"><b>13.2</b></a><ul>
     3786                  <li><em>RFC2068</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.1">7.3</a>, <a href="#rfc.xref.RFC2068.2">7.3</a>, <a href="#RFC2068"><b>14.2</b></a><ul>
    37733787                        <li><em>Section 10.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.2">7.3</a></li>
    37743788                        <li><em>Section 10.3.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.1">7.3</a></li>
    37753789                     </ul>
    37763790                  </li>
    3777                   <li><em>RFC2119</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2119.1">1.1</a>, <a href="#RFC2119"><b>13.1</b></a></li>
    3778                   <li><em>RFC2616</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.1">1</a>, <a href="#rfc.xref.RFC2616.2">7.3</a>, <a href="#RFC2616"><b>13.2</b></a>, <a href="#rfc.xref.RFC2616.3">C.1</a><ul>
     3791                  <li><em>RFC2119</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2119.1">1.1</a>, <a href="#RFC2119"><b>14.1</b></a></li>
     3792                  <li><em>RFC2616</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.1">1</a>, <a href="#rfc.xref.RFC2616.2">7.3</a>, <a href="#RFC2616"><b>14.2</b></a>, <a href="#rfc.xref.RFC2616.3">C.1</a><ul>
    37793793                        <li><em>Section 10.3.8</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.2">7.3</a></li>
    37803794                     </ul>
    37813795                  </li>
    3782                   <li><em>RFC2817</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">10.2</a>, <a href="#RFC2817"><b>13.2</b></a>, <a href="#rfc.xref.RFC2817.2">A</a>, <a href="#rfc.xref.RFC2817.3">A</a>, <a href="#rfc.xref.RFC2817.4">A</a><ul>
    3783                         <li><em>Section 7.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">10.2</a>, <a href="#rfc.xref.RFC2817.2">A</a></li>
     3796                  <li><em>RFC2817</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">11.2</a>, <a href="#RFC2817"><b>14.2</b></a>, <a href="#rfc.xref.RFC2817.2">A</a>, <a href="#rfc.xref.RFC2817.3">A</a>, <a href="#rfc.xref.RFC2817.4">A</a><ul>
     3797                        <li><em>Section 7.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">11.2</a>, <a href="#rfc.xref.RFC2817.2">A</a></li>
    37843798                     </ul>
    37853799                  </li>
    3786                   <li><em>RFC3864</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.1">3.1</a>, <a href="#rfc.xref.RFC3864.2">3.1</a>, <a href="#rfc.xref.RFC3864.3">10.3</a>, <a href="#RFC3864"><b>13.2</b></a><ul>
     3800                  <li><em>RFC3864</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.1">3.1</a>, <a href="#rfc.xref.RFC3864.2">3.1</a>, <a href="#rfc.xref.RFC3864.3">11.3</a>, <a href="#RFC3864"><b>14.2</b></a><ul>
    37873801                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.2">3.1</a></li>
    37883802                     </ul>
    37893803                  </li>
    3790                   <li><em>RFC3986</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">9.5</a>, <a href="#rfc.xref.RFC3986.2">9.5</a>, <a href="#RFC3986"><b>13.1</b></a><ul>
    3791                         <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">9.5</a></li>
    3792                         <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.2">9.5</a></li>
     3804                  <li><em>RFC3986</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">10.5</a>, <a href="#rfc.xref.RFC3986.2">10.5</a>, <a href="#RFC3986"><b>14.1</b></a><ul>
     3805                        <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">10.5</a></li>
     3806                        <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.2">10.5</a></li>
    37933807                     </ul>
    37943808                  </li>
    3795                   <li><em>RFC5226</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a>, <a href="#RFC5226"><b>13.2</b></a><ul>
     3809                  <li><em>RFC5226</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a>, <a href="#RFC5226"><b>14.2</b></a><ul>
    37963810                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a></li>
    37973811                     </ul>
    37983812                  </li>
    3799                   <li><em>RFC5234</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.1">1.2</a>, <a href="#rfc.xref.RFC5234.2">1.2</a>, <a href="#rfc.xref.RFC5234.3">3.1</a>, <a href="#RFC5234"><b>13.1</b></a><ul>
     3813                  <li><em>RFC5234</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.1">1.2</a>, <a href="#rfc.xref.RFC5234.2">1.2</a>, <a href="#rfc.xref.RFC5234.3">3.1</a>, <a href="#RFC5234"><b>14.1</b></a><ul>
    38003814                        <li><em>Appendix B.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.2">1.2</a></li>
    38013815                     </ul>
    38023816                  </li>
    3803                   <li><em>RFC5322</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.1">8</a>, <a href="#rfc.xref.RFC5322.2">9.2</a>, <a href="#rfc.xref.RFC5322.3">9.4</a>, <a href="#rfc.xref.RFC5322.4">9.4</a>, <a href="#RFC5322"><b>13.2</b></a><ul>
     3817                  <li><em>RFC5322</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.1">8</a>, <a href="#rfc.xref.RFC5322.2">10.2</a>, <a href="#rfc.xref.RFC5322.3">10.4</a>, <a href="#rfc.xref.RFC5322.4">10.4</a>, <a href="#RFC5322"><b>14.2</b></a><ul>
    38043818                        <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.1">8</a></li>
    3805                         <li><em>Section 3.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.3">9.4</a>, <a href="#rfc.xref.RFC5322.4">9.4</a></li>
    3806                         <li><em>Section 3.6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.2">9.2</a></li>
     3819                        <li><em>Section 3.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.3">10.4</a>, <a href="#rfc.xref.RFC5322.4">10.4</a></li>
     3820                        <li><em>Section 3.6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.2">10.2</a></li>
    38073821                     </ul>
    38083822                  </li>
    3809                   <li><em>RFC5789</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5789.1">6.6</a>, <a href="#RFC5789"><b>13.2</b></a></li>
    3810                   <li><em>RFC5987</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5987.1">3.1</a>, <a href="#RFC5987"><b>13.2</b></a></li>
     3823                  <li><em>RFC5789</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5789.1">6.6</a>, <a href="#RFC5789"><b>14.2</b></a></li>
     3824                  <li><em>RFC5987</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5987.1">3.1</a>, <a href="#RFC5987"><b>14.2</b></a></li>
    38113825               </ul>
    38123826            </li>
    38133827            <li><a id="rfc.index.S" href="#rfc.index.S"><b>S</b></a><ul>
    38143828                  <li>Safe Methods&nbsp;&nbsp;<a href="#rfc.iref.s.1"><b>6.1.1</b></a></li>
    3815                   <li>Server header field&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.s.38"><b>9.9</b></a>, <a href="#rfc.xref.header.server.2">10.3</a>, <a href="#rfc.xref.header.server.3">11.1</a>, <a href="#rfc.xref.header.server.4">A</a></li>
     3829                  <li>Server header field&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.s.38"><b>10.9</b></a>, <a href="#rfc.xref.header.server.2">11.3</a>, <a href="#rfc.xref.header.server.3">12.1</a>, <a href="#rfc.xref.header.server.4">A</a></li>
    38163830                  <li>Status Codes&nbsp;&nbsp;
    38173831                     <ul>
    3818                         <li>100 Continue&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.s.2"><b>7.1.1</b></a>, <a href="#rfc.xref.status.100.2">10.2</a></li>
    3819                         <li>101 Switching Protocols&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.s.3"><b>7.1.2</b></a>, <a href="#rfc.xref.status.101.2">10.2</a></li>
    3820                         <li>200 OK&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.s.4"><b>7.2.1</b></a>, <a href="#rfc.xref.status.200.2">10.2</a></li>
    3821                         <li>201 Created&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.s.5"><b>7.2.2</b></a>, <a href="#rfc.xref.status.201.2">10.2</a></li>
    3822                         <li>202 Accepted&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.s.6"><b>7.2.3</b></a>, <a href="#rfc.xref.status.202.2">10.2</a></li>
    3823                         <li>203 Non-Authoritative Information&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.s.7"><b>7.2.4</b></a>, <a href="#rfc.xref.status.203.2">10.2</a>, <a href="#rfc.xref.status.203.3">A</a></li>
    3824                         <li>204 No Content&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.s.8"><b>7.2.5</b></a>, <a href="#rfc.xref.status.204.2">10.2</a></li>
    3825                         <li>205 Reset Content&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.s.9"><b>7.2.6</b></a>, <a href="#rfc.xref.status.205.2">10.2</a></li>
    3826                         <li>300 Multiple Choices&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.s.10"><b>7.3.1</b></a>, <a href="#rfc.xref.status.300.2">10.2</a></li>
    3827                         <li>301 Moved Permanently&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.s.11"><b>7.3.2</b></a>, <a href="#rfc.xref.status.301.2">10.2</a>, <a href="#rfc.xref.status.301.3">A</a></li>
    3828                         <li>302 Found&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.s.12"><b>7.3.3</b></a>, <a href="#rfc.xref.status.302.2">10.2</a>, <a href="#rfc.xref.status.302.3">A</a></li>
    3829                         <li>303 See Other&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.s.13"><b>7.3.4</b></a>, <a href="#rfc.xref.status.303.2">10.2</a></li>
    3830                         <li>305 Use Proxy&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.s.14"><b>7.3.5</b></a>, <a href="#rfc.xref.status.305.2">10.2</a>, <a href="#rfc.xref.status.305.3">A</a></li>
    3831                         <li>306 (Unused)&nbsp;&nbsp;<a href="#rfc.iref.s.15"><b>7.3.6</b></a>, <a href="#rfc.xref.status.306.1">10.2</a></li>
    3832                         <li>307 Temporary Redirect&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.s.16"><b>7.3.7</b></a>, <a href="#rfc.xref.status.307.2">10.2</a>, <a href="#rfc.xref.status.307.3">A</a></li>
    3833                         <li>400 Bad Request&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.s.17"><b>7.4.1</b></a>, <a href="#rfc.xref.status.400.2">10.2</a></li>
    3834                         <li>402 Payment Required&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.s.18"><b>7.4.2</b></a>, <a href="#rfc.xref.status.402.2">10.2</a></li>
    3835                         <li>403 Forbidden&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.s.19"><b>7.4.3</b></a>, <a href="#rfc.xref.status.403.2">10.2</a></li>
    3836                         <li>404 Not Found&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.s.20"><b>7.4.4</b></a>, <a href="#rfc.xref.status.404.2">10.2</a></li>
    3837                         <li>405 Method Not Allowed&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.s.21"><b>7.4.5</b></a>, <a href="#rfc.xref.status.405.2">10.2</a></li>
    3838                         <li>406 Not Acceptable&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.s.22"><b>7.4.6</b></a>, <a href="#rfc.xref.status.406.2">10.2</a></li>
    3839                         <li>408 Request Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.s.23"><b>7.4.7</b></a>, <a href="#rfc.xref.status.408.2">10.2</a></li>
    3840                         <li>409 Conflict&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.s.24"><b>7.4.8</b></a>, <a href="#rfc.xref.status.409.2">10.2</a></li>
    3841                         <li>410 Gone&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.s.25"><b>7.4.9</b></a>, <a href="#rfc.xref.status.410.2">10.2</a></li>
    3842                         <li>411 Length Required&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.s.26"><b>7.4.10</b></a>, <a href="#rfc.xref.status.411.2">10.2</a></li>
    3843                         <li>413 Request Representation Too Large&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.s.27"><b>7.4.11</b></a>, <a href="#rfc.xref.status.413.2">10.2</a></li>
    3844                         <li>414 URI Too Long&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.s.28"><b>7.4.12</b></a>, <a href="#rfc.xref.status.414.2">10.2</a></li>
    3845                         <li>415 Unsupported Media Type&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.s.29"><b>7.4.13</b></a>, <a href="#rfc.xref.status.415.2">10.2</a></li>
    3846                         <li>417 Expectation Failed&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.s.30"><b>7.4.14</b></a>, <a href="#rfc.xref.status.417.2">10.2</a></li>
    3847                         <li>426 Upgrade Required&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.s.31"><b>7.4.15</b></a>, <a href="#rfc.xref.status.426.2">10.2</a>, <a href="#rfc.xref.status.426.3">A</a></li>
    3848                         <li>500 Internal Server Error&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.s.32"><b>7.5.1</b></a>, <a href="#rfc.xref.status.500.2">10.2</a></li>
    3849                         <li>501 Not Implemented&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.s.33"><b>7.5.2</b></a>, <a href="#rfc.xref.status.501.2">10.2</a></li>
    3850                         <li>502 Bad Gateway&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.s.34"><b>7.5.3</b></a>, <a href="#rfc.xref.status.502.2">10.2</a></li>
    3851                         <li>503 Service Unavailable&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.s.35"><b>7.5.4</b></a>, <a href="#rfc.xref.status.503.2">10.2</a></li>
    3852                         <li>504 Gateway Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.s.36"><b>7.5.5</b></a>, <a href="#rfc.xref.status.504.2">10.2</a></li>
    3853                         <li>505 HTTP Version Not Supported&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.s.37"><b>7.5.6</b></a>, <a href="#rfc.xref.status.505.2">10.2</a></li>
     3832                        <li>100 Continue&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.s.2"><b>7.1.1</b></a>, <a href="#rfc.xref.status.100.2">11.2</a></li>
     3833                        <li>101 Switching Protocols&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.s.3"><b>7.1.2</b></a>, <a href="#rfc.xref.status.101.2">11.2</a></li>
     3834                        <li>200 OK&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.s.4"><b>7.2.1</b></a>, <a href="#rfc.xref.status.200.2">11.2</a></li>
     3835                        <li>201 Created&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.s.5"><b>7.2.2</b></a>, <a href="#rfc.xref.status.201.2">11.2</a></li>
     3836                        <li>202 Accepted&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.s.6"><b>7.2.3</b></a>, <a href="#rfc.xref.status.202.2">11.2</a></li>
     3837                        <li>203 Non-Authoritative Information&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.s.7"><b>7.2.4</b></a>, <a href="#rfc.xref.status.203.2">11.2</a>, <a href="#rfc.xref.status.203.3">A</a></li>
     3838                        <li>204 No Content&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.s.8"><b>7.2.5</b></a>, <a href="#rfc.xref.status.204.2">11.2</a></li>
     3839                        <li>205 Reset Content&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.s.9"><b>7.2.6</b></a>, <a href="#rfc.xref.status.205.2">11.2</a></li>
     3840                        <li>300 Multiple Choices&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.s.10"><b>7.3.1</b></a>, <a href="#rfc.xref.status.300.2">11.2</a></li>
     3841                        <li>301 Moved Permanently&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.s.11"><b>7.3.2</b></a>, <a href="#rfc.xref.status.301.2">11.2</a>, <a href="#rfc.xref.status.301.3">A</a></li>
     3842                        <li>302 Found&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.s.12"><b>7.3.3</b></a>, <a href="#rfc.xref.status.302.2">11.2</a>, <a href="#rfc.xref.status.302.3">A</a></li>
     3843                        <li>303 See Other&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.s.13"><b>7.3.4</b></a>, <a href="#rfc.xref.status.303.2">11.2</a></li>
     3844                        <li>305 Use Proxy&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.s.14"><b>7.3.5</b></a>, <a href="#rfc.xref.status.305.2">11.2</a>, <a href="#rfc.xref.status.305.3">A</a></li>
     3845                        <li>306 (Unused)&nbsp;&nbsp;<a href="#rfc.iref.s.15"><b>7.3.6</b></a>, <a href="#rfc.xref.status.306.1">11.2</a></li>
     3846                        <li>307 Temporary Redirect&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.s.16"><b>7.3.7</b></a>, <a href="#rfc.xref.status.307.2">11.2</a>, <a href="#rfc.xref.status.307.3">A</a></li>
     3847                        <li>400 Bad Request&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.s.17"><b>7.4.1</b></a>, <a href="#rfc.xref.status.400.2">11.2</a></li>
     3848                        <li>402 Payment Required&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.s.18"><b>7.4.2</b></a>, <a href="#rfc.xref.status.402.2">11.2</a></li>
     3849                        <li>403 Forbidden&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.s.19"><b>7.4.3</b></a>, <a href="#rfc.xref.status.403.2">11.2</a></li>
     3850                        <li>404 Not Found&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.s.20"><b>7.4.4</b></a>, <a href="#rfc.xref.status.404.2">11.2</a></li>
     3851                        <li>405 Method Not Allowed&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.s.21"><b>7.4.5</b></a>, <a href="#rfc.xref.status.405.2">11.2</a></li>
     3852                        <li>406 Not Acceptable&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.s.22"><b>7.4.6</b></a>, <a href="#rfc.xref.status.406.2">11.2</a></li>
     3853                        <li>408 Request Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.s.23"><b>7.4.7</b></a>, <a href="#rfc.xref.status.408.2">11.2</a></li>
     3854                        <li>409 Conflict&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.s.24"><b>7.4.8</b></a>, <a href="#rfc.xref.status.409.2">11.2</a></li>
     3855                        <li>410 Gone&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.s.25"><b>7.4.9</b></a>, <a href="#rfc.xref.status.410.2">11.2</a></li>
     3856                        <li>411 Length Required&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.s.26"><b>7.4.10</b></a>, <a href="#rfc.xref.status.411.2">11.2</a></li>
     3857                        <li>413 Request Representation Too Large&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.s.27"><b>7.4.11</b></a>, <a href="#rfc.xref.status.413.2">11.2</a></li>
     3858                        <li>414 URI Too Long&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.s.28"><b>7.4.12</b></a>, <a href="#rfc.xref.status.414.2">11.2</a></li>
     3859                        <li>415 Unsupported Media Type&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.s.29"><b>7.4.13</b></a>, <a href="#rfc.xref.status.415.2">11.2</a></li>
     3860                        <li>417 Expectation Failed&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.s.30"><b>7.4.14</b></a>, <a href="#rfc.xref.status.417.2">11.2</a></li>
     3861                        <li>426 Upgrade Required&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.s.31"><b>7.4.15</b></a>, <a href="#rfc.xref.status.426.2">11.2</a>, <a href="#rfc.xref.status.426.3">A</a></li>
     3862                        <li>500 Internal Server Error&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.s.32"><b>7.5.1</b></a>, <a href="#rfc.xref.status.500.2">11.2</a></li>
     3863                        <li>501 Not Implemented&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.s.33"><b>7.5.2</b></a>, <a href="#rfc.xref.status.501.2">11.2</a></li>
     3864                        <li>502 Bad Gateway&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.s.34"><b>7.5.3</b></a>, <a href="#rfc.xref.status.502.2">11.2</a></li>
     3865                        <li>503 Service Unavailable&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.s.35"><b>7.5.4</b></a>, <a href="#rfc.xref.status.503.2">11.2</a></li>
     3866                        <li>504 Gateway Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.s.36"><b>7.5.5</b></a>, <a href="#rfc.xref.status.504.2">11.2</a></li>
     3867                        <li>505 HTTP Version Not Supported&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.s.37"><b>7.5.6</b></a>, <a href="#rfc.xref.status.505.2">11.2</a></li>
    38543868                     </ul>
    38553869                  </li>
    … …  
    38573871            </li>
    38583872            <li><a id="rfc.index.T" href="#rfc.index.T"><b>T</b></a><ul>
    3859                   <li>TRACE method&nbsp;&nbsp;<a href="#rfc.xref.TRACE.1">2.1</a>, <a href="#rfc.iref.t.1"><b>6.8</b></a>, <a href="#rfc.xref.TRACE.2">9.6</a>, <a href="#rfc.xref.TRACE.3">10.1</a>, <a href="#rfc.xref.TRACE.4">11.1</a></li>
     3873                  <li>TRACE method&nbsp;&nbsp;<a href="#rfc.xref.TRACE.1">2.1</a>, <a href="#rfc.iref.t.1"><b>6.8</b></a>, <a href="#rfc.xref.TRACE.2">10.6</a>, <a href="#rfc.xref.TRACE.3">11.1</a>, <a href="#rfc.xref.TRACE.4">12.1</a></li>
    38603874               </ul>
    38613875            </li>
    38623876            <li><a id="rfc.index.U" href="#rfc.index.U"><b>U</b></a><ul>
    3863                   <li>User-Agent header field&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.iref.u.1"><b>9.10</b></a>, <a href="#rfc.xref.header.user-agent.2">10.3</a>, <a href="#rfc.xref.header.user-agent.3">11.1</a></li>
     3877                  <li>User-Agent header field&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.iref.u.1"><b>10.10</b></a>, <a href="#rfc.xref.header.user-agent.2">11.3</a>, <a href="#rfc.xref.header.user-agent.3">12.1</a></li>
    38643878               </ul>
    38653879            </li>
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