Original commit message from CVS:
* gst/rtsp/gstrtspsrc.c: (gst_rtsp_lower_trans_get_type),
(gst_rtspsrc_class_init), (gst_rtspsrc_loop_interleaved),
(gst_rtspsrc_loop_udp), (gst_rtspsrc_open),
(gst_rtspsrc_uri_get_protocols), (gst_rtspsrc_uri_set_uri):
* gst/rtsp/rtspconnection.c: (rtsp_connection_create):
* gst/rtsp/rtspdefs.h:
* gst/rtsp/rtspurl.c: (rtsp_url_parse):
* gst/rtsp/rtspurl.h:
Reuse already existing enum for lower transport.
Add rtspt and rtspu protocols.
Send redirect to rtspt when udp times out.