This is a little patch to make xchat execute a command
(like opening a browser) when the user double click on
The added code will use the entry named 'doubleclick'
in the url handlers list settable in xchat. It works
the same way as the other handlers. Its tested on
linux, I don't know if it works on windows.
I'd appreciate any comments about the patch and for
future better implementation/integration of the same