There where still cases where the 183 keep-alive mechanism would not stop
sending 183's even though the Asterisk server had sent a final reply to
the invite.
EDVX-28
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@234492 65c4cc65-6c06-0410-ace0-fbb531ad65f3