Attached is a crude patch to enable some additional jade/openjade
warnings. This should help us catch improper or ill-advised SGML in
the docs.
I disabled the warning for empty tags, as they are used throughout the
SGML docs and there is no point in getting rid of them. I also
disabled the warning for unused parameter types, as that triggers a
warning in a system DTD on my machine.
Unless anyone objects, I'll apply this within 24 hours.
-Neil