RTMP protocol support (as a client)

Originally committed as revision 19556 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/allformats.c

@@ -209,6 +209,7 @@ void av_register_all(void)
     REGISTER_PROTOCOL (GOPHER, gopher);
     REGISTER_PROTOCOL (HTTP, http);
     REGISTER_PROTOCOL (PIPE, pipe);
+    REGISTER_PROTOCOL (RTMP, rtmp);
     REGISTER_PROTOCOL (RTP, rtp);
     REGISTER_PROTOCOL (TCP, tcp);
     REGISTER_PROTOCOL (UDP, udp);