move ff_url_split() and ff_url_join() declarations to internal.h

those functions are not part of the public API

Originally committed as revision 22534 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtmpproto.c

@@ -29,6 +29,7 @@
 #include "libavutil/lfg.h"
 #include "libavutil/sha.h"
 #include "avformat.h"
+#include "internal.h"
 
 #include "network.h"