Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55453
Do not return a response body for those status codes and request methods that do not permit one.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1518189 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55494
Reduce log level of exception messages that are logged for re-tries. Make clear in the message that a retry is taking place.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1518210 13f79535-47bb-0310-9956-ffa450edef68