SUPPORTED :
ts:toto:1234/meuh
--server toto --broadcast meuh --port 1234

The only supported syntax is :
udp[stream]:[//][serveraddr:[serverport]][@[bindaddr][:bindport]]
example : udpstream:toto@meuh:toto

In most cases, simply passing "udpstream:" should work, since it enables
unicast and broadcast reception on port 1234 from any server. Other
options are only used for fine tuning and multicast.

TODO :
* The GTK interface is broken (glade knowledge wanted !)
* Test this on all supported platforms (and fix them :)
[this won't work with current channel servers - fix needed]