- added fourcc for SNOW and DTS.
  - added 'qscale' (fixed quantizer scale - VBR) and 'strict' (standard compliance) encoding options.

* vout_Control implemented for macosx
* position slider fixed
* p_input manage loops fixed (buttons, playstatus etc)
* float on top works again
* visual filters work
* deinterlace filter selection broken
* fullscreen button is not being updated atm
* potential deadlocks between intf thread and vout thread???
* the window title might not always be updated.

OSX devs, please test as much as you can. This was all fairly low level stuff.
We need to test it properly.

   - fixed exit in embedded mode when fullscreen.
   - re-use the current video sub-window when switching to fullscreen (to have opengl working in fullscreen mode as well).
   - add options to the opengl plugin.

- bind to ::1 by default if --ipv6 is passed,
- do not overflow Unix socket path,
- use a different option (--rc-unix) for Unix socket.

* modules/control/rc.c: added option to listen on a socket instead of only stdin.
   Inspired from a patch by Bernhard Rosenkraenzer <bero at arklinux dot org>.

(thanks to Olivier Lourdais for the report)