updating configuration in xdocs + reflecting change in the configuration in changes.xml

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1597436 13f79535-47bb-0310-9956-ffa450edef68
some more jcache related features in changes.xml

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1597437 13f79535-47bb-0310-9956-ffa450edef68