* commit 'd9ae1031':
  lavf: improve handling of sparse streams when muxing

Conflicts:
	doc/APIchanges
	libavformat/avformat.h
	libavformat/mux.c
	libavformat/options_table.h
	libavformat/version.h

See: 37ed5df5Merged-by: Michael Niedermayer <michaelni@gmx.at>