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/rtsp.c

@@ -29,6 +29,7 @@
 #include <sys/select.h>
 #endif
 #include <strings.h>
+#include "internal.h"
 #include "network.h"
 #include "os_support.h"
 #include "rtsp.h"