.desktop file support for GtkFileChooser

[Federico Mena Quintero <federico ximian com>]

Hi,

I'm asking about this here because Alex is the man who knows all this
stuff :)

I've attached a patch to http://bugzilla.gnome.org/show_bug.cgi?id=136271 
so that GtkFileChooser will understand .desktop file links.  This is
necessary to browse smb:/// from within the file chooser, and to access
funny links like Novell iFolder's.

The patch is a work in progress.  Right now I can browse smb:///, but
authentication is broken.  Local links don't work.  But it should be
interesting to play with.

I would be grateful if anyone could play with the patch and see if they
can fix any bugs in it.  I'm not well-versed in how authentication is
supposed to work, or if I need extra widgetry on the file chooser side
("incorrect password" dialog?).

Thanks,

  Federico