Change nomenclature in backup config

[chazlarson]

  cron:
    cron_time: weekly
    cron_state: absent/present

That "absent/present" thing is really non-intuitive. I'd suggest changing it to something like:

  cron:
    cron_time: weekly
    schedule_with_cron: yes/no

[saltydk]

Do we want to go away from special time as well and just expose minute, hour, day, weekday, month?

My initial suggestion to the format would be

cron:
  cron_time: weekly
  enabled: yes/no

[chazlarson]

I think the simple "daily, weekly, etc" are fine. If someone wants to slice it finer than that they can edit crontab themselves.

I'm less fond of the past-tense "enabled", since I think the problem is that people think that value reflects the current state of the cron job, not how you want it to end up after you run the tag.

[saltydk]

cron:
  cron_time: weekly
  enable: yes/no

So we just go with this?

[chazlarson]

That seems fine to me.