mplayer & ffmpeg with VDPAU Support

[Felix Kaechele]

Hi there again!

I actually see a chance to have VDPAU support in the free branch. I 
looked into the needed header files vdpau.h and vdpau_x11.h and those 
individual files are licensed under the MIT license.
So if that is really the only thing that is required to build against 
VDPAU we could have a vdpau-headers package in free to build the VDPAU 
support.
If I find the time I'll further look into that.

Felix