Better handling if no message handler is configured. Message is just ignored.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1551298 13f79535-47bb-0310-9956-ffa450edef68
Need to handle case where message size limits are larger than the default buffer size. (Limits smaller than the buffer size were handled correctly.)

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1551300 13f79535-47bb-0310-9956-ffa450edef68