rcs(1) on OpenBSD
The text 847a3fdc335a, as OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3 shipped it.
RCS file management program
Flags it lists
-
-A -
-I -
-L -
-T -
-U -
-V -
-a -
-b -
-c -
-e -
-i -
-k -
-l -
-m -
-o -
-q -
-t -
-u -
-x