piconv(1) on Linux
The text d5c74f40c21e, as Debian 9 (Stretch) shipped it.
Flags it lists
-
--check -
--debug -
--from -
--help -
--htmlcref -
--list -
--perlqq -
--resolve -
--scheme -
--string -
--to -
--xmlcref -
-C -
-D -
-S -
-c -
-f -
-h -
-l -
-p -
-r -
-s -
-t