secure versions of the sites, so link to the secure version directly.
Note that for wiki links I have only fixed up key links in navbars etc,
there are a large number of other links but fixing them does not seem
worth the churn.
- Replace /XML/{doc,www}/ with /XML/ in SysId.
- Remove empty stylesheets in share/xsl and point share/xml/empty.xsl via
XML catalog instead.
- Change the L10N layer in freebsd-*.xsl not to use localized XSLT
stylesheets directly.
- Move share/xsl/* to share/xml and remove share/xsl.
- Remove obsolete share/web2c/pdftex.def.