[vserver] Gentoo initscript broken in util-vserver-0.30.216_pre3062

Hello there,

In _pre3062, the Gentoo vservers.default script does nothing and runs in
an endless loop. I think it is simply missing the util-vserver vars
sourcing, so I have made a quick patch and posted it here:
https://bugs.gentoo.org/show_bug.cgi?id=541750
I'll do the pull request on Github in a minute.

Cheers

-- 
Romain