[vserver] number of vserver guests

This just to say that I'm highly impressed with vserver's small
footprint. I've tried running hundreds of vserver guests
on low-end hardware (4-8 GByte RAM, single/dual-core Opteron)
with just ssh and nginx in them, and see no issues so far,
even without vhashify to minimize the on-disk and in-memory
footprint.

Kudos to the developers.

-- 
Eugen* Leitl leitl http://leitl.org
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