Add a sub-request filter. This filter just strips the EOS from the

brigade generated by the sub-request.  If this is not done, then the
main-request's core_output_filter will get very confused, as will any other
filter in the main-request filter-stack that looks for EOS.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86618 13f79535-47bb-0310-9956-ffa450edef68