[sr-dev] Registrar lookup function - check for local socket before path

[Juha Heinanen]

Charles Chance writes:

> Yes, we could use a separate table for each registrar and replicate
> registrations to all of them. But we still need to add Path to ensure
> invites etc go via the server each client used to register (due to client
> NAT). And if that is local to the lookup, it still makes sense to ignore
> the path as it is itself.

load_contacts() automatically prioritizes contacts so that one without
path has higher priority.  so, no changes are needed to current code.

-- juha