* src/video_output/*, src/libvlc.h, include/video_output.h: added an --align option to allow modifying the alignment of a video inside its window (very useful for the wall filter).
* modules/video_output/x11/xcommon.c: small cosmetic change.
* modules/access/v4l/v4l.c: clean-up (removed old references to encoders).