Reworked the storage of the client socket between keepalive connections

to fix some nasty problems with the socket lasting longer than the
memory pool it was allocated from.
PR:
Obtained from:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88730 13f79535-47bb-0310-9956-ffa450edef68