change the name of AP_MPM_NEEDS_RECLAIM_CHILD_PROCESSES to

be more consistent with similar names added recently; this
also cleans up an #if/#ifdef discrepency


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@90141 13f79535-47bb-0310-9956-ffa450edef68