Merge commit '5e9c6ef8'

* commit '5e9c6ef8':
  x86: h264_weight_10bit: port to cpuflags
  libtheoraenc: add missing pixdesc.h header
  avcodec: remove ff_is_hwaccel_pix_fmt
  pixdesc: add av_pix_fmt_get_chroma_sub_sample
  hlsenc: stand alone hls segmenter

Conflicts:
	doc/muxers.texi
	libavcodec/ffv1enc.c
	libavcodec/imgconvert.c
	libavcodec/mpegvideo_enc.c
	libavcodec/tiffenc.c
	libavformat/Makefile
	libavformat/allformats.c

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