Include first cut at instructions for man pages in docguide.sgml.
Fix markup.

No big deal; fixed lots of other markup at the same time.
Bigest change: make sure there is no whitespace
 in front of <term> contents.
This will probably help the other output types too.

that it doesn't crash when processing a utility statement.

a shared library, not just when installing it.

unfortunate considering that several subdirectory makefiles were counting
on it to do so...