rtsp-stream: Update comment and ASCII art to the latest code
rtsp-stream: Update comment and ASCII art to the latest code

We have a queue in front of the udpsink too to prevent the pipeline from
locking up.

surround-io/gst-rtsp-server,barisdemiray/gst-rtsp-server,barisdemiray/gst-rtsp-server,surround-io/gst-rtsp-server,barisdemiray/gst-rtsp-server,thaytan/gst-rtsp-server,thaytan/gst-rtsp-server,surround-io/gst-rtsp-server,thaytan/gst-rtsp-server