each request was not cleaned up.

This removes the nastiest symptom of some excess pipes being created
(i.e., we don't run out of file descriptors), though something
additional is needed to keep from creating the pipes to begin with.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88611 13f79535-47bb-0310-9956-ffa450edef68