lpf(1) on Linux
The text 27ffa91f0254, as Debian 1.3 (Bo) shipped it.
general printer filter
Flags it lists
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-C -
-D -
-F -
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-L -
-P -
-R -
-Z -
-c -
-h -
-i -
-l -
-n -
-w -
-x -
-y