Corrections to the new documentation page of CookieProcessor

- Added new page to left-side menu
- Added general description of the new feature in context.xml
- Corrected typos in cookie-processor.xml

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627910 13f79535-47bb-0310-9956-ffa450edef68