telnet(1) on FreeBSD
The text 7088b8e3f52d, as FreeBSD 2.1.5-RELEASE, FreeBSD 2.0.5-RELEASE shipped it.
user interface to the TELNET protocol
Flags it lists
-
-8 -
-E -
-F -
-K -
-L -
-S -
-X -
-a -
-c -
-d -
-f -
-input -
-k -
-l -
-n -
-output -
-r -
-x