add license description.

src/main/java/com/alibaba/druid/util/ServletPathMatcher.java

@@ -1,10 +1,25 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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 com.alibaba.druid.util;
 
 public class ServletPathMatcher implements PatternMatcher {
 
     /**
      * <p>
-     * three type: endsWithMatch(eg. /xxx*=/xxx/xyz), startsWithMatch(eg. *.xxx=abc.xxx), equals(eg. /xxx=/xxx)。
+     * three type: endsWithMatch(eg. /xxx*=/xxx/xyz), startsWithMatch(eg. *.xxx=abc.xxx), equals(eg. /xxx=/xxx)�
      * </p>
      * <b>Notice</b>: *xxx* will match *xxxyyyy. endsWithMatch first.
      */