better explicit than implicit. This time it fixes namespace problems

when using another processor than xalan-j. In fact, I'm not sure
if it's a bug in xalan-j to not have these problems:

<copy>'d elements got xmlns="" attribute, which even seems right to me.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102270 13f79535-47bb-0310-9956-ffa450edef68