smrsh(8) on FreeBSD
The text 63146d3cc455, as FreeBSD 4.1-RELEASE, FreeBSD 4.0-RELEASE, FreeBSD 3.5.1-RELEASE, FreeBSD 3.5-RELEASE, FreeBSD 3.4-RELEASE, FreeBSD 3.3-RELEASE, FreeBSD 3.2-RELEASE, FreeBSD 3.1-RELEASE shipped it.
restricted shell for sendmail