4.3.10.1.2. Delete Headers
+To avoid header duplication, you have to specify at least one identify key
+that can be used to uniquely recognize your header template. That way an
+existing header can be removed before a new one is inserted.
+
+A good key for the template mentioned above would be
+Sun Public License Notice.
+Most typically this will be your company's name.
+
+You can specify several keys to make it easy to switch between headers. Specify
+both a key for the old header that is to be removed and for your new header that
+should be inserted. This way, you are sure that even new additions that happens
+to contain the old header (maybe checked out from some SCM) are
+treated correctly.
+