Only keep the full pes packet if using the zvbi teletext decoder. (zvbi should be fixed to be able to use the vbi data directly without all the pes stuff)

Add "vbi-page" control in the rc interface (don't put any argument to retreive the current page number).

Conflicts:

	configure.ac			: ffmpeg headefile detection
	modules/codec/ffmpeg/chroma.c	: id madness
	modules/codec/ffmpeg/demux.c	: id madness
	modules/codec/ffmpeg/encoder.c	: id madness
	modules/codec/ffmpeg/ffmpeg.c	: id madness
	modules/codec/ffmpeg/postprocess.c : id madness
	modules/codec/ffmpeg/video.c	: id madness
	modules/codec/ffmpeg/video_filter.c : id madness
	modules/stream_out/switcher.c	: id madness
	modules/stream_out/transcode.c	: m2x branch uses id->ufilter iso id->vfilter
	src/playlist/view.c		: id madness
	src/stream_output/stream_output.c : id madness

This reverts commit c37341f1.
Wrong fix, do not trust Ubuntu users.

Fix [e6e22cae]

This reverts commit 55e7393c.
This need to be done in the GUIs

Really close #1227

This fixes #1578 for -bugfix. This breaks plugins from the source tree
(so we obviously need some more involved fix for master).

(cherry picked from commit 62a71b89)