FreeSWITCH

Merge pull request #737 in FS/freeswitch from ~CARLOSP/freeswitch:bugfix/FS-8910-sdes-not-properly-negotiated-when to master

* commit '8fa947aa19a9c6e202ab644975be39b966f6201c':
  FS-8910: Properly negotiate SDES when receiving SDP with a=crypto:0