Abandoning, overcome by events that have equivalent effect as what this review set out to do too long ago when I could not spend sufficient time on this. My apologies to everyone who has been waiting and inconvenienced for so long.

A similar thing has been committed as of today, which had been prepared by @arrowd with contributions from Alexander Shursha <kekek2@ya.ru> who set up two clean libuuid/libblkid ports that are based on meson build of util-linux.

Thanks for the contribution, but I think this arrives too early (unless I've missed documentation, and I believe I checked the usual places).

1. Veto for now.
2. Technically: Do we happen to have a computer that has all non-conflicting ports installed so that we can search it for scripts using the uuidd? I wouldn't like to break their runtimes.
3. Organizationally: I am not comfortable with a new maintainer, or one external to the project, for a high-profile port. See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251489 for conditions under which I offer to maintain libuuid.