Add a per context option to select the cookie parser to use and add the
necessary plumbing to pass that choice to the cookie parser.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1621983 13f79535-47bb-0310-9956-ffa450edef68
Add a performance test for non-RFC2109 cookies (which nearly all will
be)

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1621984 13f79535-47bb-0310-9956-ffa450edef68