[Devel] ignore rtp proxy if two clients are behind NAT and if they have the same external ip

[Piotr Szymanek]

> to debug, try to print (via xlog) the i:13 avp and $src_ip.

I don't know how to enable debug mode

If I set fork = no in openser.cfg
and execute openser in commandline
I can't login into server, so I can't test it :(

Thanks 
Piter