-ensure that we can accept IPv6 addresses in the Transport settings in repro.config

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10042 ddefafc4-47db-0310-ae44-fa13212b10f2
-don't create a Tuple out of a Via hostname if it isn't an IP address
-exceptions where seen repro when handling web-rtc messages that contain
 hostnames in the via host

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10043 ddefafc4-47db-0310-ae44-fa13212b10f2