Session client support in libxfce4ui

[Brian J. Tarricone]

Brian J. Tarricone wrote:

> X11 session management is IMHO crap, whether it's the old X11R5 protocol 
> or the "new" X11R6 protocol.

To clarify: either the protocol was crap from the start, or it's too old 
and outdated to meet today's needs, or Xfce's implementation of it is 
poor.  I suspect it's one of the first two since Benny did most of the 
work on our implementation ^_~.

	-brian