identd(8) on OpenBSD
The text 5d8b7d249f5c, as OpenBSD 3.3 shipped it.
TCP/IP IDENT protocol server
Flags it lists
-
-H -
-N -
-U -
-a -
-b -
-c -
-d -
-e -
-g -
-h -
-i -
-l -
-m -
-n -
-o -
-p -
-t -
-u -
-v -
-w