(1) Make sure there is a Copyright notice on all files.
(2) Make sure all years in which a file has been modified are
listed.
(3) Make sure the format is consistent, i.e. separate consecutive
years with a dash, not a comma.
(4) Change some references from Tomcat to Ant.
git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270658 13f79535-47bb-0310-9956-ffa450edef68