vaccess_acl_posix1e(9) on FreeBSD
The text 4cf013a83240, as FreeBSD 5.5-RELEASE, FreeBSD 5.4-RELEASE, FreeBSD 5.3-RELEASE, FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE, FreeBSD 5.0-RELEASE shipped it.
generate a POSIX.1e ACL access control decision using vnode parameters