executor: do not remove tokens when retiring machines + add machine deletion support
The only moment we should remove a machine's token is when deleting a machine... which we also introduce in this series :)
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
The only moment we should remove a machine's token is when deleting a machine... which we also introduce in this series :)