lavf/concatdec: define "ffcat" and "ffconcat" extensions

libavformat/concatdec.c

@@ -289,4 +289,5 @@ AVInputFormat ff_concat_demuxer = {
     .read_packet    = concat_read_packet,
     .read_close     = concat_read_close,
     .priv_class     = &concat_class,
+    .extensions     = "ffconcat,ffcat",
 };

libavformat/version.h

@@ -31,7 +31,7 @@
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
 #define LIBAVFORMAT_VERSION_MINOR 63
-#define LIBAVFORMAT_VERSION_MICRO 100
+#define LIBAVFORMAT_VERSION_MICRO 101
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \