ftpd(8) on OpenBSD
The text ad71b630196b, as OpenBSD 5.5, OpenBSD 5.4, OpenBSD 5.3 shipped it.
Internet File Transfer Protocol server
Flags it lists
-
-4 -
-6 -
-A -
-D -
-M -
-P -
-S -
-T -
-U -
-W -
-d -
-l -
-n -
-t -
-u