Merge r501364 from trunk:

* server/listen.c (ap_apply_accept_filter): Bump TCP_DEFER_ACCEPT
argument to 30 units-of-unspecified-nature.

Submitted by: Dean Gaudet <dean arctic.org>
Reviewed by: ylavic, trawick, covener



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1608298 13f79535-47bb-0310-9956-ffa450edef68