[doc][2.2] Provide a note related to use of multiple Require directives on some setups

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1626056 13f79535-47bb-0310-9956-ffa450edef68
Fix previous commit - mutiple notes

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1626059 13f79535-47bb-0310-9956-ffa450edef68