Note: tetex comes with a a built-in texi2html which can be disabled via configure option '--without-texi2html', so we build texi2html before tetex if both packages are enabled and disable to build texi2html in tetex.
git-svn-id: svn://svn.opensde.net/opensde/package/trunk@20072 10447126-35f2-4685-b0cf-6dd780d3921f