Merge commit 'b5849f77095439e994b11c25e6063d443b36c228'

* commit 'b5849f77095439e994b11c25e6063d443b36c228': (21 commits)
  ac3enc: merge AC3MDCTContext with AC3EncodeContext.
  ac3enc: prefer passing AC3EncodeContext rather than AVCodecContext
  ac3enc: fix memleak
  mpeg1video: add CODEC_CAP_SLICE_THREADS.
  lavf: fix segfault in av_open_input_stream()
  mpegtsenc: set Random Access indicator on keyframe start packets
  lavf: Cleanup try_decode_frame() logic.
  Replace some gotos that lead to single return statements by direct return.
  build: move tests/seek_test.c to libavformat and reuse generic build rules
  mxfenc: include needed header for ff_iso8601_to_unix_time() prototype
  Add a check for strptime().
  lavf: factor out conversion of ISO8601 string to unix time
  wav: parse 'bext' metadata
  wav: keep parsing until EOF if the input is seekable and we know the size of the data tag
  wav: Refactor the tag checking into a switch statement
  wav: make sure neither data_size nor sample_count is negative.
  wav: refactor the 'fmt ' tag search and parsing.
  wav: add an option for writing BEXT chunk
  ffmpeg: get rid of a pointless limit on number of streams.
  ffmpeg: remove an unused define.
  ...

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

ffserver.c

@@ -3508,7 +3508,7 @@ static int add_av_stream(FFStream *feed, AVStream *st)
             case AVMEDIA_TYPE_AUDIO:
                 if (av1->channels == av->channels &&
                     av1->sample_rate == av->sample_rate)
-                    goto found;
+                    return i;
                 break;
             case AVMEDIA_TYPE_VIDEO:
                 if (av1->width == av->width &&
@@ -3516,7 +3516,7 @@ static int add_av_stream(FFStream *feed, AVStream *st)
                     av1->time_base.den == av->time_base.den &&
                     av1->time_base.num == av->time_base.num &&
                     av1->gop_size == av->gop_size)
-                    goto found;
+                    return i;
                 break;
             default:
                 abort();
@@ -3528,8 +3528,6 @@ static int add_av_stream(FFStream *feed, AVStream *st)
     if (!fst)
         return -1;
     return feed->nb_streams - 1;
- found:
-    return i;
 }
 
 static void remove_stream(FFStream *stream)