days_of_week allows all as a value, making it easier to list all 7 values. The start_mins attribute should behave similarly, saving one from having to list all 60.
It's a good deterrent against someone doing it all the time for every job JUST because.
some things should be hard to do.
just my 3 cents
I definitely would not want someone starting a job every minute. I agree with Steve, that should be hard to do.
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