doc: updated copyright notice.

Author: agentzh

README.markdown

@@ -184,7 +184,7 @@ Copyright and License
 
 This module is licensed under the BSD license.
 
-Copyright (C) 2012-2016, by Yichun "agentzh" Zhang (章亦春) <agentzh@gmail.com>, CloudFlare Inc.
+Copyright (C) 2012-2017, by Yichun "agentzh" Zhang (章亦春) <agentzh@gmail.com>, OpenResty Inc.
 
 All rights reserved.