In spite of there being considerable documentation sometimes in the
config file, we go with CC0 because we don't want the notion of
'derived work' of a config file.
The example `settings.conf` is also CC0. Add some docs to
it while we're at it.
This module allows the generation of the initramfs in Alpine Linux based
systems (excluding postmarketOS). Very bare bones, but then again it
doesn't need much. It uses the Alpine Linux tool "mkinitfs" to do the
job.