IPv6 support for chan_ooh323

IPv6 support for chan_ooh323

IPv6 support for ooh323,
bindaddr, peers and users ip can be IPv4 or IPv6 addr
correction for multi-homed mode (0.0.0.0 or :: bindaddr)
can work in dual 6/4 mode with :: bindaddr
gatekeeper mode isn't supported in v6 mode while

(issue #18278)
Reported by: may213
Patches:
      ipv6-ooh323.patch uploaded by may213 (license 454)

Review: https://reviewboard.asterisk.org/r/1004/

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@313482 65c4cc65-6c06-0410-ace0-fbb531ad65f3