Check for the RTSP version before the method.
Check for the RTSP version before the method.

If a client sends a request for a method that comes from a different
RTSP version, instead of answering 501 "Not Implement" we should
answer 505 "RTSP Version not supported", so that the client knows not
to use that protocol version at all.

lscube/feng,lscube/feng,winlinvip/feng,winlinvip/feng,winlinvip/feng,lscube/feng