chflags(1) on OpenBSD
The text fd80bccf055a, as OpenBSD 5.4, OpenBSD 5.3, OpenBSD 5.2, OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9 shipped it.
change file flags
Flags it lists
-
-H -
-L -
-P -
-R