fix sound forwarding for osx and win32 shadow servers
|Reported by:||Antoine Martin||Owned by:||Antoine Martin|
When we shadow an OSX or win32 session, we want to forward the sound generated by those applications rather than any capture device (microphone).
It would also be nice to re-use the device selection code from pulseaudio (name match), and maybe introduce better command line arguments for it too.
Some changes already for win32: r12647 should allow us to select the capture device.