Reduce duplicate by moving error handling into addInputFilter.
Also makes error handling consistent.
Reduce visibility of addInputFilter()

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1599738 13f79535-47bb-0310-9956-ffa450edef68
Tiny bit of de-duplication.
Add reference to RFC2616 for case insensitivity of transfer encoding
names.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1599739 13f79535-47bb-0310-9956-ffa450edef68
https://issues.apache.org/bugzilla/show_bug.cgi?id=56582#c1
Implement DISPATCH_EXECUTE action for AJP connector.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1599752 13f79535-47bb-0310-9956-ffa450edef68