telnet(1) on OpenBSD
The text dd3d4b63dce7, as OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3 shipped it.
user interface to the TELNET protocol
Flags it lists
-
-4 -
-6 -
-7 -
-8 -
-D -
-E -
-K -
-L -
-V -
-a -
-b -
-c -
-e -
-l -
-n -
-r