This patch fixes some issues I had when I tried to
validate my generated html files.
In XHTML all tags must be lowercase. In
hyperlatex-final-substitutions I changed a closing </A>
In hyperlatex-tabular-posn LEFT, CENTER, RIGHT had to
be changed to lowercase, too.
In siteinit.hlx \htmlcss and \htmlcharset generated
empty elements without a "/>".
I've attached a patch that fixes these problems.