boxes(1) on Linux
The text 029c7f672002, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
text mode box and comment drawing filter
Flags it lists
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-a -
-d -
-f -
-h -
-i -
-k -
-l -
-p -
-r -
-s -
-t -
-v