[Nut-upsuser] ownership of pid directory

[Arjen de Korte]

> The cpsups driver has some flow control issues...  my cyberpower 1200AVR
> is kinda dumb.

The cpsups driver is rightfully flagged 'experimental'. There has been no
active maintenance on this driver for at least two years. We have tried to
fix some obvious errors in it, but if we can't find a developer to iron
out the remaining issues with it, it probably deserves to be flagged
'broken' instead.

Best regards, Arjen
-- 
Eindhoven - The Netherlands
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