p_playlist() -> p_playlist ???

Add missing include, fix build error

aout_TogleMute() -> aout_ToggleMute()

It will fix interoperability with live555 server.

The "Open" and "Run" functions of the interface have been changed to
  - avoid running the interface in the main thread (Windows)
  - destroy all ressources in reverse order from creation
  - a few cleanup/cosmetic things

Note that all outputs onto the same TCP port must have the same certificates.

(cherry picked from commit 0e4d1695)

If you want to try it and report bugs use --enable-projectm.