PR56832 -- mod_ratelimit reports at ERROR level evertyime a lower-level filter

encounters an error. Since the core output filter only emits TRACE1, a higher
level filter shouldn't log the same condition as ERROR.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1617018 13f79535-47bb-0310-9956-ffa450edef68