none of \fB-users, -lists, -strings, \fRor \fB-kerberos\fR is specified, then all
of them will be displayed.
.IP \fB-kerberos\ \fRor\ \fB-k\fR:
none of \fB-users, -lists, -strings, \fRor \fB-kerberos\fR is specified, then all
of them will be displayed.
.IP \fB-kerberos\ \fRor\ \fB-k\fR: