znew(1) on OpenBSD
The text 9f6311ba0136, as OpenBSD 3.3, OpenBSD 3.2, OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9, OpenBSD 2.8, OpenBSD 2.7, OpenBSD 2.6, OpenBSD 2.5, OpenBSD 2.4, OpenBSD 2.3, OpenBSD 2.2, OpenBSD 2.1 shipped it.
recompress .Z files to .gz files
Flags it lists
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-9 -
-K -
-P -
-f -
-t -
-v