Temporary hack to ensure that the split results are within a brigade

Temporary hack to ensure that the split results are within a brigade
attached to the proper pool. Otherwise, ctx->b would end up associated with
the request pool, and the SOCKET bucket from the CORE_IN filter would get
cleared at request end (thus the next request would go to CORE_IN for more
data and get APR_EOF, and figured there were no more requests).

This section of code was only triggered when a request had a body. The
symptom was closing the connection (even though it should have been a
keepalive) after the response was sent.

For more info, see Message-ID on dev@: <20010917061613.B466@lyra.org>

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91053 13f79535-47bb-0310-9956-ffa450edef68