Allow extra text after maintainer comment
It would be useful to allow e.g. the following
# Maintainer: Foo Bar <firstname.lastname@example.org> @foobar
@foobar is the GitLab username of this person.
It can be quite complicated from looking at an APKBUILD to find the correct person to tag in GitLab so this would allow this to be simplified.
This is less relevant for Alpine Linux because of the automatic tagging by algitbot (because it can do email->username lookup) but in postmarketOS this is not possible as far as I'm aware as we're on gitlab.com and don't have access to this lookup.