Registering new protocol with gnome

[Sharven Raabe <gnome silberdrache net>]

Hello,

could anyone tell me please how you register a new, custom application 
layer protocol with Gnome? The admin guide is very extensive about new 
MIME types, but a protocol ain't even mentioned.

The protocol in question is "secondlife:". Gnome shall requests to that 
protocol to the Second Life client software, simply call "secondlife 
%s". This setting should be specific to the one user, since the software 
in question isn't stable yet and thus installed in a user space.

Thanks,
Sharven