Merge remote-tracking branch 'qatar/master'

* qatar/master:
  ARM: allow runtime masking of CPU features
  dsputil: remove unused functions
  mov: Treat keyframe indexes as 1-origin if starting at non-zero.
  mov: Take stps entries into consideration also about key_off.
  Remove lowres video decoding

Conflicts:
	ffmpeg.c
	ffplay.c
	libavcodec/arm/vp8dsp_init_arm.c
	libavcodec/libopenjpegdec.c
	libavcodec/mjpegdec.c
	libavcodec/mpegvideo.c
	libavcodec/utils.c
	libavformat/mov.c

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

libavcodec/intrax8.c

@@ -716,7 +716,6 @@ av_cold void ff_intrax8_common_end(IntraX8Context * w)
  * The parent codec must call MPV_frame_start(), ff_er_frame_start() before calling this function.
  * The parent codec must call ff_er_frame_end(), MPV_frame_end() after calling this function.
  * This function does not use MPV_decode_mb().
- * lowres decoding is theoretically impossible.
  * @param w pointer to IntraX8Context
  * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1.
  * @param quant_offset offset away from zero