Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56172
Avoid possible request corruption when using the AJP NIO connector and a request is sent using more than one AJP message.
Patch provided by Amund Elstad.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1570547 13f79535-47bb-0310-9956-ffa450edef68