New comment by Duncaen on void-packages repository

https://github.com/void-linux/void-packages/pull/20098#issuecomment-599243492

Comment:
> SIGPWR is sent to init (process 1) directly, so no need to create any files (like stopit). Runit also reboots on getting SIGCONT (it is also not configurable)

Its configurable through the `/etc/runit/stopit` file. If the file doesn't exist or is not `S_IXUSR`, then runit won't shutdown.
This makes sure only `runit-init 0` can bring down runit, not a random `SIGCONT` or `SIGINT`.

Edit: this is as far as I know the whole deal about `stopit`, otherwise only `reboot` would exist.