Test for https://issues.apache.org/bugzilla/show_bug.cgi?id=56185

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1571725 13f79535-47bb-0310-9956-ffa450edef68
WIP NIO2 connector
Fixes and cleanups for input stability.
Fix output corruption for blocking IO.