- new packages: xine-decode-modplug and xine-output-video-vdpau

- new packages: xine-decode-modplug and xine-output-video-vdpau
- BR: libxdg-basedir (to always use system library instead of included version)
- -devel now requires ffmpeg-devel (for libavutil), libxdg-basedir-devel, zlib-devel
- killed remnants of xvid (not supported since long time; use ffmpeg instead)
- disable silent-rules (using V=1 because of .am hackery)
- vdr has been merged upstream, drop separate source and bcond

Changed files:
    xine-lib.spec -> 1.303