HTML files (not all of them, just some of them).
Fix up the broken references to point to the correct files.
This has not touched the release notes in releases/*/*. I'm not sure
whether they should remain as historical record of what was shipped or
not. About 5 of them now have a couple of broken links each, which will
be trivial to fix.
docproj.sgml, and added a new 'docproj' directory which contains other
project related .sgml files (and a Makefile). Updated the main Makefile to
include this new directory.
Reviewed by the various members of the -doc mailing list (including
John Fieber) over the past week or so.
