Bump required version of Apache httpd to 2.2.x or newer.

* INSTALL: Change from 2.x to 2.2.x or newer.

* configure.ac: Require 2.2.x's module magic number.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1572339 13f79535-47bb-0310-9956-ffa450edef68