FreeSWITCH-FS-7447

Merge pull request #207 in FS/freeswitch from ~MBRANCA/freeswitch:bugfix/FS-6954-freeswitch-adds-additional-m-audio to master

* commit 'ca2dd2f3ba80924567472c0516ee8bac2af34d6a':
  FS-6954 Detect when we have T.38 in nomedia or proxy media mode and apply same fixups as in media mode.