Update license headers.

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@531612 13f79535-47bb-0310-9956-ffa450edef68

plugin/plugin.properties

@@ -1,9 +1,10 @@
 # -------------------------------------------------------------------
-# Copyright 2001-2005 The Apache Software Foundation.
-# 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
 # 
 #      http://www.apache.org/licenses/LICENSE-2.0
 #