Use standard licence text and SPDX identifier.

Author: aaugustin

LICENSE

@@ -1,5 +1,4 @@
-Copyright (c) 2013-2021 Aymeric Augustin and contributors.
-All rights reserved.
+Copyright (c) Aymeric Augustin and contributors
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
@@ -9,9 +8,9 @@ modification, are permitted provided that the following conditions are met:
     * Redistributions in binary form must reproduce the above copyright notice,
       this list of conditions and the following disclaimer in the documentation
       and/or other materials provided with the distribution.
-    * Neither the name of websockets nor the names of its contributors may
-      be used to endorse or promote products derived from this software without
-      specific prior written permission.
+    * Neither the name of the copyright holder nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

setup.py

@@ -38,7 +38,7 @@
     url="https://github.com/aaugustin/websockets",
     author="Aymeric Augustin",
     author_email="[email protected]",
-    license="BSD",
+    license="BSD-3-Clause",
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Environment :: Web Environment",