couriertls(1) on Linux
The text e22361aaf547, as Debian 3.1 (Sarge) shipped it.
Courier TLS/SSL protocol wrapper
Flags it lists
-
-host -
-localfd -
-port -
-printx509 -
-protocol -
-remotefd -
-server -
-statusfd -
-tcpd -
-verify