Allow the front end to register audio setup and teardown functions. These
functions should use FreeRDP's rdpsnd_server_context or
audin_server_context and set up their own handler threads.
The backend remains mostly ignorant to any audio details beyond setting up
and tearing down.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Derek Foreman
c8db957a0b