net-misc/sslh currently (as of version 1.17) doesn't install a systemd service. Upstream, however, does provide one - so Gentoo should install it: https://github.com/yrutschle/sslh/blob/master/scripts/systemd.sslh.service Reproducible: Always
Does it work for you? I don't use systemd to test.
Yes, it does work for me. I've submitted a pull request that adds a systemd USE flag to install the service and a service generator that upstream now includes: https://github.com/gentoo/gentoo/pull/1741
For future reference, the PR was merged in git: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f51fc3240bc6f1f37736ece7f8ecfc5a242e7712