* Clean up some twisted code in the iax2_bridge() loop.
* Add AST_CONTROL_VIDUPDATE and AST_CONTROL_SRCCHANGE to a list of frames
to prevent the native bridge loop from breaking.
* Passing the AST_CONTROL_T38_PARAMETERS frame should also allow FAX over
a native IAX2 bridge.
(issue ABE-2912)
Review: https://reviewboard.asterisk.org/r/2870/
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@399697 65c4cc65-6c06-0410-ace0-fbb531ad65f3