rcs(1) on OpenBSD
The text 936f0bbf12f9, as OpenBSD 3.9 shipped it.
RCS file management program
Flags it lists
-
-A -
-I -
-L -
-M -
-T -
-U -
-V -
-a -
-b -
-c -
-e -
-h -
-i -
-k -
-m -
-o -
-q -
-s -
-t -
-x -
-z