ZOOKEEPER-4056: Update copyright notices from 2020 to 2021

ztzg · Enrico Olivelli · commit b995c559e6a5 · 2021-01-11T12:02:19.000+01:00
See ZOOKEEPER-3745 for previous iteration. Author: Damien Diederen <dd@crosstwine.com> Reviewers: Enrico Olivelli <eolivelli@apache.org> Closes apache#1577 from ztzg/ZOOKEEPER-4056-copyright-2021
diff --git a/NOTICE.txt b/NOTICE.txt
@@ -1,5 +1,5 @@
 Apache ZooKeeper
-Copyright 2009-2020 The Apache Software Foundation
+Copyright 2009-2021 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/zookeeper-docs/src/main/resources/markdown/zookeeperCLI.md b/zookeeper-docs/src/main/resources/markdown/zookeeperCLI.md
@@ -1,5 +1,5 @@
 <!--
-Copyright 2002-2020 The Apache Software Foundation
+Copyright 2002-2021 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.
diff --git a/zookeeper-docs/src/main/resources/markdown/zookeeperMonitor.md b/zookeeper-docs/src/main/resources/markdown/zookeeperMonitor.md
@@ -1,5 +1,5 @@
 <!--
-Copyright 2002-2020 The Apache Software Foundation
+Copyright 2002-2021 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.
diff --git a/zookeeper-docs/src/main/resources/markdown/zookeeperTools.md b/zookeeper-docs/src/main/resources/markdown/zookeeperTools.md
@@ -1,5 +1,5 @@
 <!--
-Copyright 2002-2020 The Apache Software Foundation
+Copyright 2002-2021 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.
diff --git a/zookeeper-docs/src/main/resources/markdown/zookeeperUseCases.md b/zookeeper-docs/src/main/resources/markdown/zookeeperUseCases.md
@@ -1,5 +1,5 @@
 <!--
-Copyright 2002-2020 The Apache Software Foundation
+Copyright 2002-2021 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.
diff --git a/zookeeper-server/src/main/resources/NOTICE.txt b/zookeeper-server/src/main/resources/NOTICE.txt
@@ -1,5 +1,5 @@
 Apache ZooKeeper
-Copyright 2009-2020 The Apache Software Foundation
+Copyright 2009-2021 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
