etcupdate(8) on FreeBSD
The text 32e73f3f5b43, as FreeBSD 12.1-RELEASE shipped it.
manage updates to system files not updated by installworld
Flags it lists
-
-A -
-B -
-D -
-F -
-I -
-L -
-M -
-d -
-n -
-p -
-r -
-s -
-t