Merge remote-tracking branch 'qatar/master'

* qatar/master:
  os_support: Define SHUT_RD, SHUT_WR and SHUT_RDWR on OS/2
  http: Add support for reading http POST reply headers
  http: Add http_shutdown() for ending writing of posts
  tcp: Allow signalling end of reading/writing
  avio: Add a function for signalling end of reading/writing
  lavfi: fix comment, audio is supported now.
  lavfi: fix incorrect comment.
  lavfi: remove avfilter_null_* from public API on next bump.
  lavfi: remove avfilter_default_* from public API on next bump.
  lavfi: deprecate default config_props() callback and refactor avfilter_config_links()
  avfiltergraph: smarter sample format selection.
  avconv: rename transcode_audio/video to decode_audio/video.
  asyncts: reset delta to 0 when it's not used.
  x86: lavc: use %if HAVE_AVX guards around AVX functions in yasm code.
  dwt: return errors from ff_slice_buffer_init()

Conflicts:
	ffmpeg.c
	libavfilter/avfilter.c
	libavfilter/avfilter.h
	libavfilter/formats.c
	libavfilter/version.h
	libavfilter/vf_blackframe.c
	libavfilter/vf_drawtext.c
	libavfilter/vf_fade.c
	libavfilter/vf_format.c
	libavfilter/vf_showinfo.c
	libavfilter/video.c
	libavfilter/video.h

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

libavfilter/avfilter.c

@@ -202,7 +202,6 @@ int avfilter_config_links(AVFilterContext *filter)
                     link->sample_aspect_ratio = inlink ?
                         inlink->sample_aspect_ratio : (AVRational){1,1};
 
-#if 1
                 if (inlink) {
                     if (!link->w)
                         link->w = inlink->w;
@@ -233,7 +232,6 @@ int avfilter_config_links(AVFilterContext *filter)
                     link->time_base = (AVRational) {1, link->sample_rate};
             }
 
-#endif
             if ((config_link = link->dstpad->config_props))
                 if ((ret = config_link(link)) < 0)
                     return ret;