identd(8) on OpenBSD
The text 7222b14b1b4e, as OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9 shipped it.
TCP/IP IDENT protocol server
Flags it lists
-
-N -
-U -
-V -
-a -
-b -
-c -
-d -
-e -
-g -
-h -
-i -
-l -
-m -
-n -
-o -
-p -
-t -
-u -
-v -
-w