[Systems] Updates

[Bernie Innocenti]

I've ran security/stability updates on sunjammer, lightwave, treehouse,
aslo-web, rt and dextrose.

Additionally:

 * I've removed emacs-gtk from aslo-web, which resulted in the chain
removal of a ton of X11 junk. Please do not install X11 clients on
servers unless there's a compelling reason.

 * I've made postfix on the dextrose VM listen only on localhost. BTW,
are we still using this VM?

 * I've shut down the "status" VM, which seems unused.

I haven't updated any of the other machines. If you own a VM hosted on
treehouse or housetree, remember that keeping it secure is your own
duty.

-- 
Bernie Innocenti
Sugar Labs Infrastructure Team
http://wiki.sugarlabs.org/go/Infrastructure_Team