* fix ffmpeg extra flags

  m=video 1234 udp 33      for raw UDP
  m=video 1234 RTP/AVP 33  for RTP

- now SAP announces have proper source address in o= line

(VLC expects muxed streams on port 1234)

* This should fix switching from a stereo device to surround40 or surround51 with the alsa audio output (close #85).
* Now we probe the device for supported formats on each device change
* Please test this, at least on stereo inputs. We don't want a broken alsa audio output in 0.8.4...

their version number up, but at least it doesn't break builds with older
versions of ffmpeg)

* let's run 'make clean-src' when typing 'make clean', since make clean-bin won't be used anyway. The user is informed of this through a message.

* Renamed "Advanced" subcat of "Input / Codecs" into "General" and made all the advanced options within it hidden.

vlccontrol.cpp: fixed a bug when processing target options stored in a safe array, last element in array was never processed

  This is really dirty btw. the OS X GUI module has some serious memory management issues.

(it was not padding properly the end of encoded stream)