FreeSWITCH

Merge pull request #588 in FS/freeswitch from ~ANDEE/freeswitch:bugfix/FS-8432-wrong-timestamp-resolution-in-mpd_amqp to master

* commit '8c540c6632fc083b551c7e4966d72ad79b2ed0b4':
  FS-8432 fixes timestamp type resolution, adds new header of type uint64 to carry microsecond resolution timestamp