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/rtpproto.c

@@ -30,6 +30,7 @@
 
 #include <unistd.h>
 #include <stdarg.h>
+#include "internal.h"
 #include "network.h"
 #include "os_support.h"
 #include <fcntl.h>