xfce4-session parallel startup

[Brian J. Tarricone]

Hi all,

I've committed some changes to xfce4-session that allow it to start up
session clients in parallel when you log into Xfce.  This is part of an
effort to speed up desktop startup.

The new code seems to work well, but it needs huge amounts of testing,
and it would be nice to iron out any major issues before beta1.  So,
those of you running svn, if you'd update xfce4-session, and log out
and back in, that would be most appreciated.

Stuff that needs testing:

* Log in.  Make sure all session-managed apps that should start have
indeed started.

* Log out and save your session.  Log back in and make sure apps that
should restart have started.

* Log out and *don't* save your session.  Log back in and make sure apps
that should restart have started.

Keep Xfce running for a while, starting and quitting applications that
use session management.  Make sure Xfce doesn't crash.  If you can
enable core dumps, or attach gdb to xfce4-session after you log in, and
run that way, that would be great.  I don't anticipate crashes, but
it's of course possible I've done something wrong.  Periodically check
'top' output to see if xfce4-session seems to be eating too much
memory, or an increasing amount of memory.  (Might want to check to see
what reasonable values are before you update to svn trunk.)

You may want to watch the tracking bug for this for updates:
http://bugzilla.xfce.org/show_bug.cgi?id=4312

	-brian