Merge remote-tracking branch 'qatar/master'

* qatar/master:
  APIchanges: fill in missing hashes and dates.
  Add an APIChanges entry and bump minor versions for recent changes.
  ffmpeg: print the low bitrate warning after the codec is openend.
  doxygen: Move function documentation into the macro generating the function.
  doxygen: Make sure parameter names match between .c and .h files.
  h264: move fill_decode_neighbors()/fill_decode_caches() to h264_mvpred.h
  H.264: Add more x86 assembly for 10-bit H.264 predict functions
  lavf: fix invalid reads in avformat_find_stream_info()
  cmdutils: replace opt_default with opt_default2() and remove set_context_opts
  ffmpeg: use new avcodec_open2 and avformat_find_stream_info API.
  ffplay: use new avcodec_open2 and avformat_find_stream_info API.
  cmdutils: store all codec options in one dict instead of video/audio/sub
  ffmpeg: check experimental flag after codec is opened.
  ffmpeg: do not set GLOBAL_HEADER flag in the options context

Conflicts:
	cmdutils.c
	doc/APIchanges
	ffmpeg.c
	ffplay.c
	libavcodec/version.h
	libavformat/version.h
	libswscale/swscale_unscaled.c

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

libavfilter/graphparser.c

@@ -141,6 +141,8 @@ static int create_filter(AVFilterContext **filt_ctx, AVFilterGraph *ctx, int ind
  * corresponding filter instance which is added to graph with
  * create_filter().
  *
+ * @param filt_ctx Pointer that is set to the created and configured filter
+ *                 context on success, set to NULL on failure.
  * @param filt_ctx put here a pointer to the created filter context on
  * success, NULL otherwise
  * @param buf pointer to the buffer to parse, *buf will be updated to