re-propose skiplist to 2.4


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1510512 13f79535-47bb-0310-9956-ffa450edef68
ivote


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1510525 13f79535-47bb-0310-9956-ffa450edef68
ipromote


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1510526 13f79535-47bb-0310-9956-ffa450edef68