I am in the process of changing the docs build process so the build stuff will no longer live in the httpd-2.0 tree. If you want docs builds to work, don't update your tree for the next little while. When I am finished, instructions for using the new system will be at http://httpd.apache.org/docs-project/docsformat.html
The summary is (and this should work already): cd httpd-2.0/docs/manual cvs co -d build site-tools/httpd-docs-build/ cd build ./build.sh Joshua.