Run prelink and other stuff not in cron but when screensaver is active.

[Alan Cox]

> > This reminds me, that it's seriously annoying
> > that xscreensaver runs for vnc sessions. Seems
> > like an easy fix.
> 
> How do you suggest?  There are several possible approaches.

Its actually useful in a thin client environment that it does. And the
user can configure blanking easily enough