Merge pull request #284 in FS/freeswitch from ~DRAGOS_OANCEA/freeswitch-dragos:opus_debugging_audiobandwidth to master

* commit '595bba20':
  FS-7660: mod_opus: add function to show information about Opus payload (number of frames, number of samples per frame, audio bandwidth, FEC info). Enabled with new API command "opus_debug".