A maintenance mode feature

[AlanCoding]

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Feature type

New Feature

Feature Summary

This would be a new "control" type task, but would go outside of the scope of the current control-with-reply task scope.

After receiving a message to go into maintenance mode, no new tasks will be started. There would be 2 sub-options about what to do with new tasks received while in this mode:

1. Discard any new tasks
2. Queue any new tasks, to be ran after coming out of this mode

Filed because I talked with @kdelee, and this would be used as a part of a larger system that deprovisions nodes or does upgrades.

Steps to reproduce

N/A

Current results

No response

Sugested feature result

see description

Additional information

No response