Add tests for
https://issues.apache.org/bugzilla/show_bug.cgi?id=56179
https://issues.apache.org/bugzilla/show_bug.cgi?id=56185
(Backport of r1571245, r1571725)

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1571731 13f79535-47bb-0310-9956-ffa450edef68