telnet(1) on FreeBSD
The text c51575c52ad7, as FreeBSD 2.2.9-RELEASE shipped it.
user interface to the TELNET protocol
Flags it lists
-
-8 -
-E -
-F -
-K -
-L -
-N -
-S -
-X -
-a -
-c -
-d -
-e -
-f -
-input -
-k -
-l -
-n -
-output -
-r -
-x