New comment by jcgruenhage on void-packages repository

https://github.com/void-linux/void-packages/pull/31552#issuecomment-864211992

Comment:
> call me out if I'm wrong here, but no prefix should be needed for `Public Domain`

We require the `custom:` prefix for everything that's not an SPDX license identifier, and while there are a few public domain alike licenses, there is not really the one, so this needs to be there.

Edit: argh, yes, I cant read. updated.