Make more timers settable in SIP so that we can force timeout earlier on...

Make more timers settable in SIP so that we can force timeout earlier on non-responsive SIP servers.
Thanks, jcmoore, for the patch!

Reported by: jcmoore
Patches: 
      peer_t1_timerb_trunk_v3.patch.txt uploaded by jcmoore (license 9)
(closes issue #9771)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@93159 65c4cc65-6c06-0410-ace0-fbb531ad65f3