Add a temporary pool argument to unixd_pre_config, so that it can call

APR functions (grumble). This is needed for apr_stat, which will be in
the suexec path coming up.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86710 13f79535-47bb-0310-9956-ffa450edef68