The AVStream.parser field is considered private and its location cannot be
preserved while preserving also ABI compatibility to libav, as libav added fields
before it.
Some tools like ffmpeg.c access this field though
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 62227a70)

Conflicts:

	RELEASE_NOTES
	doc/APIchanges
	libavformat/utils.c
	libavformat/version.h
(cherry picked from commit a78e6363e9a7ef90bd1ff4aeceee8e5501cbc6d4)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>