[MPlayer-dev-eng] Real rtsp:// support

[Roberto Togni]

Hi all,
  i ported Real rtsp:// support from xine.

It works with the few links i tried, please test.

It depends on file extension to differentiate between Real rtsp and 
standard rtsp urls. It's not a foolproof method, but it was easy to 
implement. Ideas are welcome (my only attemp to switch to a different 
stream type after a failed connection with Real lib was unsuccessful, 
but i'll try again).

At the moment only .rm files are supported, if you know other working 
extensions please report them.

There's is still a lot of cleanup to do (unused functions and message 
output expecially), but i'm trying keep changes to a minimum to make 
future syncs with xine codebase easier.

I don't know much about the internals of the code, so if you have a url 
that doesn't work please test it also with xine; if it's broken there 
too, then i probably can't help you.

Ciao,
  Roberto