[Nut-upsdev] passing nut_debug_level from upsdrvctl to drivers

[Charles Lepple]

Is there any reason why we couldn't pass the -D flags (counted by
nut_debug_level) from upsdrvctl to the individual drivers? It seems a
little strange to suggest to users that they should start the drivers
with upsdrvctl normally, but then start them by hand for debugging.
(If we want to debug upsdrvctl itself, we could use another flag for
that, instead of -D.)

-- 
- Charles Lepple