[Nut-upsuser] Multiple ups/Belkin 1500VA no serial number

[Arjen de Korte]

>> It also requires us to rewrite some
>> stuff, since the library is incompatible with libusb-0.1.
> iirc, a transition compat layer is scheduled.

Yes, but that will only allow us to use the 'old' commands, which can't
handle multiple identically looking devices. In order to address this,
we'll probably have to use 'new' commands from libusb, that won't be
present in the older version.

Using the compatibility layer doesn't solve anything.

Best regards, Arjen