service_seusers(5) on Linux
The text b870808aabfe, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it. The page shows this text now.
The SELinux GNU/Linux user and service to SELinux user mapping configuration files