gzip(1) on OpenBSD
The text b859ded5346a, as OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3, OpenBSD 6.2, OpenBSD 6.1, OpenBSD 6.0, OpenBSD 5.9, OpenBSD 5.8, OpenBSD 5.7 shipped it.
compress and expand data (deflate mode)
Flags it lists
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-1...9 -
-L -
-N -
-O -
-S -
-V -
-b -
-c -
-d -
-f -
-h -
-l -
-n -
-o -
-q -
-r -
-t -
-v