[Nut-upsuser] Negative values for ups.delay.shutdown and ups.delay.start

[Bruno Wolff III]

I was testing my new MGE Nova 1100 and I am seeing negative numbers for
ups.delay.start and ups.delay.shutdown which seems odd, but also seems to
be expected according to examples I have found for MGE Systems.

Can someone explain or point me to an explanation of what those numbers
mean? The short descriptions don't appear to be compatible with negative
numbers.