While the ICE negotiation is occurring leave strictrtp in an open state, media...

While the ICE negotiation is occurring leave strictrtp in an open state, media can and will come from different places.
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Merged revisions 382298 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@382299 65c4cc65-6c06-0410-ace0-fbb531ad65f3