doc/muxers/segment: remove wrong default indication for segment_list_flags option
cmdutils: cosmetics

requested by multiple people

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/avpacket: correctly set the number of side data elements in av_copy_packet_side_data()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: fix do_streamcopy() so it copies side data too

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>