The XSLT Saxon engine warns that match="@*" will return only attribute nodes,...

The XSLT Saxon engine warns that  match="@*" will return only attribute nodes, which can't have any attributes or child.

So simplify the xsl rules accordingly.

Tested with:
   ./build.sh all
with and without the change.
Outputs are exactly the same.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1842146 13f79535-47bb-0310-9956-ffa450edef68