Merge remote-tracking branch 'qatar/master'

* qatar/master:
  crypto: Use av_freep instead of av_free
  lavf: don't try to free private options if priv_data is NULL.
  swscale: fix types of assembly arguments.
  swscale: move two macros that are only used once into caller.
  swscale: remove unused function.
  options: Add missing braces around struct initializer.
  mov: Remove leftover crufty debug statement with references to a local file.
  dvbsubdec: Fix compilation of debug code.
  Remove all uses of now deprecated metadata functions.
  Move metadata API from lavf to lavu.

Conflicts:
	doc/APIchanges
	libavformat/aiffdec.c
	libavformat/asfdec.c
	libavformat/avformat.h
	libavformat/avidec.c
	libavformat/cafdec.c
	libavformat/matroskaenc.c
	libavformat/mov.c
	libavformat/mp3enc.c
	libavformat/wtv.c
	libavutil/avutil.h
	libavutil/internal.h
	libswscale/swscale.c
	libswscale/x86/swscale_template.c

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

libavformat/iff.c

@@ -30,6 +30,7 @@
 
 #include "libavcodec/bytestream.h"
 #include "libavutil/intreadwrite.h"
+#include "libavutil/dict.h"
 #include "avformat.h"
 
 #define ID_8SVX       MKTAG('8','S','V','X')
@@ -109,7 +110,7 @@ static int get_metadata(AVFormatContext *s,
         return AVERROR(EIO);
     }
     buf[data_size] = 0;
-    av_metadata_set2(&s->metadata, tag, buf, AV_METADATA_DONT_STRDUP_VAL);
+    av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
     return 0;
 }