When shutting down a process, free resources early

Due to lingering connections, shutting down a process may take a very
long time. Free all recycled pools early in the hope that we can already
give some memory back to the OS.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1705922 13f79535-47bb-0310-9956-ffa450edef68