Merge r1304985 from trunk:

Mention SSL certificate checks are now enabled by default, as opposed to disabled in 2.2.
Submitted by: Petter Berntsen (petterb@gmail.com)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1304987 13f79535-47bb-0310-9956-ffa450edef68