Document that asyncio contains uvloop code

Some of the asyncio SSL changes in GH-31275 were taken from
[v0.16.0 of the uvloop project][1]. In order to comply with the MIT
license, we need to just need to document the copyright information.

[1]: https://github.com/MagicStack/uvloop/tree/v0.16.0

Author: aloisklink

Doc/license.rst

@@ -1040,3 +1040,30 @@ https://www.w3.org/TR/xml-c14n2-testcases/ and is distributed under the
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+asyncio
+----------
+
+The :mod:`asyncio` module contains the following notice::
+
+  Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io
+
+  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.

Lib/asyncio/constants.py

@@ -1,3 +1,7 @@
+# Contains code from https://github.com/MagicStack/uvloop/tree/v0.16.0
+# SPDX-License-Identifier: PSF-2.0 AND (MIT OR Apache-2.0)
+# SPDX-FileCopyrightText: Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io
+
 import enum
 
 # After the connection is lost, log warnings after this many write()s.

Lib/asyncio/events.py

@@ -1,5 +1,9 @@
 """Event loop and event loop policy."""
 
+# Contains code from https://github.com/MagicStack/uvloop/tree/v0.16.0
+# SPDX-License-Identifier: PSF-2.0 AND (MIT OR Apache-2.0)
+# SPDX-FileCopyrightText: Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io
+
 __all__ = (
     'AbstractEventLoopPolicy',
     'AbstractEventLoop', 'AbstractServer',

Lib/asyncio/sslproto.py

@@ -1,3 +1,7 @@
+# Contains code from https://github.com/MagicStack/uvloop/tree/v0.16.0
+# SPDX-License-Identifier: PSF-2.0 AND (MIT OR Apache-2.0)
+# SPDX-FileCopyrightText: Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io
+
 import collections
 import enum
 import warnings

Lib/test/test_asyncio/test_ssl.py

@@ -1,3 +1,7 @@
+# Contains code from https://github.com/MagicStack/uvloop/tree/v0.16.0
+# SPDX-License-Identifier: PSF-2.0 AND (MIT OR Apache-2.0)
+# SPDX-FileCopyrightText: Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io
+
 import asyncio
 import contextlib
 import gc

Misc/ACKS

@@ -957,6 +957,7 @@ Carsten Klein
 Bastian Kleineidam
 Joel Klimont
 Bob Kline
+Alois Klink
 Matthias Klose
 Jeremy Kloth
 Thomas Kluyver

Misc/NEWS.d/next/Documentation/2023-08-01-13-11-39.gh-issue-95649.F4KhPS.rst

@@ -0,0 +1,3 @@
+Document that the :mod:`asyncio` module contains code taken from `v0.16.0 of
+the uvloop project <https://github.com/MagicStack/uvloop/tree/v0.16.0>`_, as
+well as the required MIT licensing information.