New comment by daniel-eys on void-packages repository

https://github.com/void-linux/void-packages/issues/20452#issuecomment-606802891

Comment:
crypttab is done by the distribution's init system, so runit in void's case.
Void's crypttab wrapper is an awk script (`/etc/runit/crypt.awk`), where you can read, what cryptsetup options are wrapped.
For the documentaion of those options, see `man 8 cryptsetup`.