improve 2.4.7 entry related to mpm-itk, completing the list of

required hooks and limiting the name to the 1 of 3 people that
implemented the hook that ended up in 2.4.x


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1507852 13f79535-47bb-0310-9956-ffa450edef68