mtree(8) on OpenBSD
The text a242187d61ec, as OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9 shipped it.
map a directory hierarchy
Flags it lists
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-K -
-U -
-c -
-d -
-e -
-f -
-i -
-k -
-l -
-n -
-p -
-q -
-r -
-s -
-t -
-u -
-x