Move creation of the pollcb object to after we fork(), since kqueues don't...

Move creation of the pollcb object to after we fork(), since kqueues don't persist across fork(). (huh, didn't know that before)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@709653 13f79535-47bb-0310-9956-ffa450edef68