Revisit local and public SockAddr values.

[ctrlaltdavid]

Especially as sent in as sent in DomainConnectRequest and DomainListRequest packets.
WebRTC 0.0.0.0:0 values are currently sent and this appears to trigger changing the user's session ID when connecting to a remote domain server (but doesn't trigger when using domain server on localhost or local network). The user's session ID should not change during connection, except to go from null to non-null value.