add preservation of copyright and license notices

NOTICE

@@ -3,3 +3,20 @@ Copyright 2018-2020
 
 This product includes software developed at
 The Alibaba MiddleWare Group.
+
+The concurrent-map project
+=============
+This product contains code from the concurrent-map project:
+Please visit the concurrent-map github web site for more information:
+https://github.com/orcaman/concurrent-map
+
+Copyright (c) 2014 streamrail
+
+
+The go.uuid project
+=============
+This product contains code from the go.uuid project:
+Please visit the go.uuid github web site for more information:
+https://github.com/satori/go.uuid
+
+Copyright (C) 2013-2018 by Maxim Bublis <[email protected]>

clients/cache/concurrent_map.go

@@ -1,18 +1,28 @@
 /*
- * Copyright 1999-2020 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.
- */
+
+The MIT License (MIT)
+
+Copyright (c) 2014 streamrail
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
 
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