Hi Michał,
> Where do I need to register?
For any significant contribution in copyright terms, you'll have to sign
an assignment of copyright of your work to the FSF and it's GNU groff.
https://www.fsf.org/licensing/contributor-faq
That put me off.
Alas, groff's requirement for copyright assignment to the FSF ruled
out contributions from me many years ago after the FSF's legal
counsel confirmed they'd hold partial copyright on a non-groff work
which contained code of copyrightable expression if I later used it
in groff; the order in time doesn't matter. The FSF want 100%
ownership to enforce copyright but deny 100% ownership of that
earlier work in doing so.
— https://www.mail-archive.com/groff@gnu.org/msg15539.html
--
Cheers, Ralph.
