Provide a request processing time for an error response if possible.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1513782 13f79535-47bb-0310-9956-ffa450edef68
Async read/write errors need to trigger error responses so the socket is closed.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1513783 13f79535-47bb-0310-9956-ffa450edef68
Remove unused code.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1513784 13f79535-47bb-0310-9956-ffa450edef68
Remove reference to attributes that no longer exist.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1513787 13f79535-47bb-0310-9956-ffa450edef68
Remove reference to attributes that no longer exist.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1513788 13f79535-47bb-0310-9956-ffa450edef68