Merge r1763749 from trunk:

update link to TCP_DEFER_ACCEPT

per http://httpd.apache.org/docs/2.4/mod/core.html#comment_5866

kernel.org links here.




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1763750 13f79535-47bb-0310-9956-ffa450edef68