RefID Changes

There are several problems with around refids in the current RFC.

• The decision to use an IPv4 address was convenient and is no longer useful
  • S2+ refids are being used as IPs for tracing
  • S2+ IPv6 refids are colliding with valid IPv4 addresses

It doesn't help that the stock ntpq -p output shows the refid as an IPv4 address and does not display the association ID. That will be changing soon:

• ​http://bugs.ntp.org/2778
• ​http://bugs.ntp.org/278