Update docs

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627614 13f79535-47bb-0310-9956-ffa450edef68
Update docs

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627615 13f79535-47bb-0310-9956-ffa450edef68
Fix typo

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627616 13f79535-47bb-0310-9956-ffa450edef68