[ppml] getting converts to V6

[Randy Bush]

>> if a server is v6 enabled, then ALL SERVICES must be v6 capable or 
>> there are painful failures.
> If a DNS name has an IPv6 address associated with it, then clients are
> going to try using IPv6 towards the server with that name. If a service
> then doesn't support IPv6 the clients will encounter an error message,
> which in most cases means they immediately try again over IPv4.

nice theory.  in practice, if all services do not support v6, then you will
be getting noc calls.

randy