Use "accept filtering" on recent versions of FreeBSD iff the

kernel is configured to support them. This allows Apache to avoid
having to handle new connections until the request has arrived.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@86110 13f79535-47bb-0310-9956-ffa450edef68