Change to Apache License version 2.0.

samples/contacts/src/main/java/sample/contact/WebContactValidator.java

@@ -1,8 +1,16 @@
-/*
- * The Acegi Security System for Spring is published under the terms
- * of the Apache Software License.
+/* Copyright 2004 Acegi Technology Pty Limited
  *
- * Visit http://acegisecurity.sourceforge.net for further details.
+ * 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
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package sample.contact;