Correct Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1539979 13f79535-47bb-0310-9956-ffa450edef68
Remove TODO and improve comment. Review from kkolinko

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1539980 13f79535-47bb-0310-9956-ffa450edef68