- Previously all links started in 'command_' which led to conflicts
and was confusing for non-command items.
- Use a per-section name that is meaningful to humans.
- Fix link id names to be valid HTML.
(http://www.oasis-open.org/docbook/xml/4.2/), which users can then convert
to other formats.
Tested with meinproc from KDE, which generates HTML pages which look good.
Alex