Change to Experimental module to avoid an ever-expanding brigade,

absorb the buckets we've consumed.  Better ways to do this lurk here.

Backport: r580206

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@580219 13f79535-47bb-0310-9956-ffa450edef68