lfc-listgrpmap(1) on Linux
The text c0f5df799228, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
query about a given group or list all existing groups in virtual gid table