Fix errors in Commons Annotations 1.0 and add some @since markers

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1548970 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=52811
Correctly parse values passed to HttpServletResponse.setContentType() to extract the character encoding

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1548971 13f79535-47bb-0310-9956-ffa450edef68