compress(1) on OpenBSD
The text 83cabecdb7b1, as OpenBSD 5.5 shipped it.
compress and expand data (compress mode)
Flags it lists
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-1...9 -
-N -
-O -
-S -
-b -
-c -
-d -
-f -
-g -
-h -
-l -
-n -
-o -
-q -
-r -
-t -
-v