FreeSWITCH

Merge pull request #1642 in FS/freeswitch from FSA/freeswitch-advantage:andrey-fsa-to-public-master to master

* commit 'd0cca7e222cd2b85b900026b0be15bf60e497bfd':
  FS-11555: [mod_signalwire] Initial commit.
  FS-11565: [Build-System] Add 48kHz sounds to the Visual Studio solution on Windows.
  FS-11547: [core] Fix broken record_sample_rate variable.