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Update urllib3 to 2.2.3 #460

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This PR updates urllib3 from 1.26.18 to 2.2.3.

Changelog

2.2.3

==================

Features
--------

- Added support for Python 3.13. (`3473 <https://github.com/urllib3/urllib3/issues/3473>`__)

Bugfixes
--------

- Fixed the default encoding of chunked request bodies to be UTF-8 instead of ISO-8859-1.
All other methods of supplying a request body already use UTF-8 starting in urllib3 v2.0. (`3053 <https://github.com/urllib3/urllib3/issues/3053>`__)
- Fixed ResourceWarning on CONNECT with Python < 3.11.4 by backporting https://github.com/python/cpython/issues/103472. (`#3252 <https://github.com/urllib3/urllib3/issues/3252>`__)
- Adjust tolerance for floating-point comparison on Windows to avoid flakiness in CI (`3413 <https://github.com/urllib3/urllib3/issues/3413>`__)
- Fixed a crash where certain standard library hash functions were absent in restricted environments. (`3432 <https://github.com/urllib3/urllib3/issues/3432>`__)
- Fixed mypy error when adding to ``HTTPConnection.default_socket_options``. (`3448 <https://github.com/urllib3/urllib3/issues/3448>`__)

HTTP/2 (experimental)
---------------------

HTTP/2 support is still in early development.

- Excluded Transfer-Encoding: chunked from HTTP/2 request body (`3425 <https://github.com/urllib3/urllib3/issues/3425>`__)
- Added version checking for ``h2`` (https://pypi.org/project/h2/) usage.

Now only accepting supported h2 major version 4.x.x. (`3290 <https://github.com/urllib3/urllib3/issues/3290>`__)
- Added a probing mechanism for determining whether a given target origin
supports HTTP/2 via ALPN. (`3301 <https://github.com/urllib3/urllib3/issues/3301>`__)
- Add support for sending a request body with HTTP/2 (`3302 <https://github.com/urllib3/urllib3/issues/3302>`__)


Deprecations and Removals
-------------------------

- Note for downstream distributors: the ``_version.py`` file has been removed and is now created at build time by hatch-vcs. (`3412 <https://github.com/urllib3/urllib3/issues/3412>`__)
- Drop support for end-of-life PyPy3.8 and PyPy3.9. (`3475 <https://github.com/urllib3/urllib3/issues/3475>`__)

2.2.2

==================

- Added the ``Proxy-Authorization`` header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via ``Retry.remove_headers_on_redirect``.
- Allowed passing negative integers as ``amt`` to read methods of ``http.client.HTTPResponse`` as an alternative to ``None``. (`3122 <https://github.com/urllib3/urllib3/issues/3122>`__)
- Fixed return types representing copying actions to use ``typing.Self``. (`3363 <https://github.com/urllib3/urllib3/issues/3363>`__)

2.2.1

==================

- Fixed issue where ``InsecureRequestWarning`` was emitted for HTTPS connections when using Emscripten. (`3331 <https://github.com/urllib3/urllib3/issues/3331>`__)
- Fixed ``HTTPConnectionPool.urlopen`` to stop automatically casting non-proxy headers to ``HTTPHeaderDict``. This change was premature as it did not apply to proxy headers and ``HTTPHeaderDict`` does not handle byte header values correctly yet. (`3343 <https://github.com/urllib3/urllib3/issues/3343>`__)
- Changed ``InvalidChunkLength`` to ``ProtocolError`` when response terminates before the chunk length is sent. (`2860 <https://github.com/urllib3/urllib3/issues/2860>`__)
- Changed ``ProtocolError`` to be more verbose on incomplete reads with excess content. (`3261 <https://github.com/urllib3/urllib3/issues/3261>`__)

2.2.0

==================

- Added support for `Emscripten and Pyodide <https://urllib3.readthedocs.io/en/latest/reference/contrib/emscripten.html>`__, including streaming support in cross-origin isolated browser environments where threading is enabled. (`#2951 <https://github.com/urllib3/urllib3/issues/2951>`__)
- Added support for ``HTTPResponse.read1()`` method. (`3186 <https://github.com/urllib3/urllib3/issues/3186>`__)
- Added rudimentary support for HTTP/2. (`3284 <https://github.com/urllib3/urllib3/issues/3284>`__)
- Fixed issue where requests against urls with trailing dots were failing due to SSL errors
when using proxy. (`2244 <https://github.com/urllib3/urllib3/issues/2244>`__)
- Fixed ``HTTPConnection.proxy_is_verified`` and ``HTTPSConnection.proxy_is_verified``
to be always set to a boolean after connecting to a proxy. It could be
``None`` in some cases previously. (`3130 <https://github.com/urllib3/urllib3/issues/3130>`__)
- Fixed an issue where ``headers`` passed in a request with ``json=`` would be mutated (`3203 <https://github.com/urllib3/urllib3/issues/3203>`__)
- Fixed ``HTTPSConnection.is_verified`` to be set to ``False`` when connecting
from a HTTPS proxy to an HTTP target. It was set to ``True`` previously. (`3267 <https://github.com/urllib3/urllib3/issues/3267>`__)
- Fixed handling of new error message from OpenSSL 3.2.0 when configuring an HTTP proxy as HTTPS (`3268 <https://github.com/urllib3/urllib3/issues/3268>`__)
- Fixed TLS 1.3 post-handshake auth when the server certificate validation is disabled (`3325 <https://github.com/urllib3/urllib3/issues/3325>`__)
- Note for downstream distributors: To run integration tests, you now need to run the tests a second
time with the ``--integration`` pytest flag. (`3181 <https://github.com/urllib3/urllib3/issues/3181>`__)

2.1.0

==================

- Removed support for the deprecated urllib3[secure] extra. (`2680 <https://github.com/urllib3/urllib3/issues/2680>`__)
- Removed support for the deprecated SecureTransport TLS implementation. (`2681 <https://github.com/urllib3/urllib3/issues/2681>`__)
- Removed support for the end-of-life Python 3.7. (`3143 <https://github.com/urllib3/urllib3/issues/3143>`__)
- Allowed loading CA certificates from memory for proxies. (`3065 <https://github.com/urllib3/urllib3/issues/3065>`__)
- Fixed decoding Gzip-encoded responses which specified ``x-gzip`` content-encoding. (`3174 <https://github.com/urllib3/urllib3/issues/3174>`__)

2.0.7

==================

* Made body stripped from HTTP requests changing the request method to GET after HTTP 303 "See Other" redirect responses.

2.0.6

==================

* Added the ``Cookie`` header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via ``Retry.remove_headers_on_redirect``.

2.0.5

==================

- Allowed pyOpenSSL third-party module without any deprecation warning. (`3126 <https://github.com/urllib3/urllib3/issues/3126>`__)
- Fixed default ``blocksize`` of ``HTTPConnection`` classes to match high-level classes. Previously was 8KiB, now 16KiB. (`3066 <https://github.com/urllib3/urllib3/issues/3066>`__)

2.0.4

==================

- Added support for union operators to ``HTTPHeaderDict`` (`2254 <https://github.com/urllib3/urllib3/issues/2254>`__)
- Added ``BaseHTTPResponse`` to ``urllib3.__all__`` (`3078 <https://github.com/urllib3/urllib3/issues/3078>`__)
- Fixed ``urllib3.connection.HTTPConnection`` to raise the ``http.client.connect`` audit event to have the same behavior as the standard library HTTP client (`2757 <https://github.com/urllib3/urllib3/issues/2757>`__)
- Relied on the standard library for checking hostnames in supported PyPy releases (`3087 <https://github.com/urllib3/urllib3/issues/3087>`__)

2.0.3

==================

- Allowed alternative SSL libraries such as LibreSSL, while still issuing a warning as we cannot help users facing issues with implementations other than OpenSSL. (`3020 <https://github.com/urllib3/urllib3/issues/3020>`__)
- Deprecated URLs which don't have an explicit scheme (`2950 <https://github.com/urllib3/urllib3/pull/2950>`_)
- Fixed response decoding with Zstandard when compressed data is made of several frames. (`3008 <https://github.com/urllib3/urllib3/issues/3008>`__)
- Fixed ``assert_hostname=False`` to correctly skip hostname check. (`3051 <https://github.com/urllib3/urllib3/issues/3051>`__)

2.0.2

==================

- Fixed ``HTTPResponse.stream()`` to continue yielding bytes if buffered decompressed data
was still available to be read even if the underlying socket is closed. This prevents
a compressed response from being truncated. (`3009 <https://github.com/urllib3/urllib3/issues/3009>`__)

2.0.1

==================

- Fixed a socket leak when fingerprint or hostname verifications fail. (`2991 <https://github.com/urllib3/urllib3/issues/2991>`__)
- Fixed an error when ``HTTPResponse.read(0)`` was the first ``read`` call or when the internal response body buffer was otherwise empty. (`2998 <https://github.com/urllib3/urllib3/issues/2998>`__)

2.0.0

==================

Read the `v2.0 migration guide <https://urllib3.readthedocs.io/en/latest/v2-migration-guide.html>`__ for help upgrading to the latest version of urllib3.

Removed
-------

* Removed support for Python 2.7, 3.5, and 3.6 (`883 <https://github.com/urllib3/urllib3/issues/883>`__, `#2336 <https://github.com/urllib3/urllib3/issues/2336>`__).
* Removed fallback on certificate ``commonName`` in ``match_hostname()`` function.
This behavior was deprecated in May 2000 in RFC 2818. Instead only ``subjectAltName``
is used to verify the hostname by default. To enable verifying the hostname against
``commonName`` use ``SSLContext.hostname_checks_common_name = True`` (`2113 <https://github.com/urllib3/urllib3/issues/2113>`__).
* Removed support for Python with an ``ssl`` module compiled with LibreSSL, CiscoSSL,
wolfSSL, and all other OpenSSL alternatives. Python is moving to require OpenSSL with PEP 644 (`2168 <https://github.com/urllib3/urllib3/issues/2168>`__).
* Removed support for OpenSSL versions earlier than 1.1.1 or that don't have SNI support.
When an incompatible OpenSSL version is detected an ``ImportError`` is raised (`2168 <https://github.com/urllib3/urllib3/issues/2168>`__).
* Removed the list of default ciphers for OpenSSL 1.1.1+ and SecureTransport as their own defaults are already secure (`2082 <https://github.com/urllib3/urllib3/issues/2082>`__).
* Removed ``urllib3.contrib.appengine.AppEngineManager`` and support for Google App Engine Standard Environment (`2044 <https://github.com/urllib3/urllib3/issues/2044>`__).
* Removed deprecated ``Retry`` options ``method_whitelist``, ``DEFAULT_REDIRECT_HEADERS_BLACKLIST`` (`2086 <https://github.com/urllib3/urllib3/issues/2086>`__).
* Removed ``urllib3.HTTPResponse.from_httplib`` (`2648 <https://github.com/urllib3/urllib3/issues/2648>`__).
* Removed default value of ``None`` for the ``request_context`` parameter of ``urllib3.PoolManager.connection_from_pool_key``. This change should have no effect on users as the default value of ``None`` was an invalid option and was never used (`1897 <https://github.com/urllib3/urllib3/issues/1897>`__).
* Removed the ``urllib3.request`` module. ``urllib3.request.RequestMethods`` has been made a private API.
This change was made to ensure that ``from urllib3 import request`` imported the top-level ``request()``
function instead of the ``urllib3.request`` module (`2269 <https://github.com/urllib3/urllib3/issues/2269>`__).
* Removed support for SSLv3.0 from the ``urllib3.contrib.pyopenssl`` even when support is available from the compiled OpenSSL library (`2233 <https://github.com/urllib3/urllib3/issues/2233>`__).
* Removed the deprecated ``urllib3.contrib.ntlmpool`` module (`2339 <https://github.com/urllib3/urllib3/issues/2339>`__).
* Removed ``DEFAULT_CIPHERS``, ``HAS_SNI``, ``USE_DEFAULT_SSLCONTEXT_CIPHERS``, from the private module ``urllib3.util.ssl_`` (`2168 <https://github.com/urllib3/urllib3/issues/2168>`__).
* Removed ``urllib3.exceptions.SNIMissingWarning`` (`2168 <https://github.com/urllib3/urllib3/issues/2168>`__).
* Removed the ``_prepare_conn`` method from ``HTTPConnectionPool``. Previously this was only used to call ``HTTPSConnection.set_cert()`` by ``HTTPSConnectionPool`` (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Removed ``tls_in_tls_required`` property from ``HTTPSConnection``. This is now determined from the ``scheme`` parameter in ``HTTPConnection.set_tunnel()`` (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Removed the ``strict`` parameter/attribute from ``HTTPConnection``, ``HTTPSConnection``, ``HTTPConnectionPool``, ``HTTPSConnectionPool``, and ``HTTPResponse`` (`2064 <https://github.com/urllib3/urllib3/issues/2064>`__).

Deprecated
----------

* Deprecated ``HTTPResponse.getheaders()`` and ``HTTPResponse.getheader()`` which will be removed in urllib3 v2.1.0. Instead use ``HTTPResponse.headers`` and ``HTTPResponse.headers.get(name, default)``. (`1543 <https://github.com/urllib3/urllib3/issues/1543>`__, `#2814 <https://github.com/urllib3/urllib3/issues/2814>`__).
* Deprecated ``urllib3.contrib.pyopenssl`` module which will be removed in urllib3 v2.1.0 (`2691 <https://github.com/urllib3/urllib3/issues/2691>`__).
* Deprecated ``urllib3.contrib.securetransport`` module which will be removed in urllib3 v2.1.0 (`2692 <https://github.com/urllib3/urllib3/issues/2692>`__).
* Deprecated ``ssl_version`` option in favor of ``ssl_minimum_version``. ``ssl_version`` will be removed in urllib3 v2.1.0 (`2110 <https://github.com/urllib3/urllib3/issues/2110>`__).
* Deprecated the ``strict`` parameter of ``PoolManager.connection_from_context()`` as it's not longer needed in Python 3.x. It will be removed in urllib3 v2.1.0 (`2267 <https://github.com/urllib3/urllib3/issues/2267>`__)
* Deprecated the ``NewConnectionError.pool`` attribute which will be removed in urllib3 v2.1.0 (`2271 <https://github.com/urllib3/urllib3/issues/2271>`__).
* Deprecated ``format_header_param_html5`` and ``format_header_param`` in favor of ``format_multipart_header_param`` (`2257 <https://github.com/urllib3/urllib3/issues/2257>`__).
* Deprecated ``RequestField.header_formatter`` parameter which will be removed in urllib3 v2.1.0 (`2257 <https://github.com/urllib3/urllib3/issues/2257>`__).
* Deprecated ``HTTPSConnection.set_cert()`` method. Instead pass parameters to the ``HTTPSConnection`` constructor (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Deprecated ``HTTPConnection.request_chunked()`` method which will be removed in urllib3 v2.1.0. Instead pass ``chunked=True`` to ``HTTPConnection.request()`` (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).

Added
-----

* Added top-level ``urllib3.request`` function which uses a preconfigured module-global ``PoolManager`` instance (`2150 <https://github.com/urllib3/urllib3/issues/2150>`__).
* Added the ``json`` parameter to ``urllib3.request()``, ``PoolManager.request()``, and ``ConnectionPool.request()`` methods to send JSON bodies in requests. Using this parameter will set the header ``Content-Type: application/json`` if ``Content-Type`` isn't already defined.
Added support for parsing JSON response bodies with ``HTTPResponse.json()`` method (`2243 <https://github.com/urllib3/urllib3/issues/2243>`__).
* Added type hints to the ``urllib3`` module (`1897 <https://github.com/urllib3/urllib3/issues/1897>`__).
* Added ``ssl_minimum_version`` and ``ssl_maximum_version`` options which set
``SSLContext.minimum_version`` and ``SSLContext.maximum_version`` (`2110 <https://github.com/urllib3/urllib3/issues/2110>`__).
* Added support for Zstandard (RFC 8878) when ``zstandard`` 1.18.0 or later is installed.
Added the ``zstd`` extra which installs the ``zstandard`` package (`1992 <https://github.com/urllib3/urllib3/issues/1992>`__).
* Added ``urllib3.response.BaseHTTPResponse`` class. All future response classes will be subclasses of ``BaseHTTPResponse`` (`2083 <https://github.com/urllib3/urllib3/issues/2083>`__).
* Added ``FullPoolError`` which is raised when ``PoolManager(block=True)`` and a connection is returned to a full pool (`2197 <https://github.com/urllib3/urllib3/issues/2197>`__).
* Added ``HTTPHeaderDict`` to the top-level ``urllib3`` namespace (`2216 <https://github.com/urllib3/urllib3/issues/2216>`__).
* Added support for configuring header merging behavior with HTTPHeaderDict
When using a ``HTTPHeaderDict`` to provide headers for a request, by default duplicate
header values will be repeated. But if ``combine=True`` is passed into a call to
``HTTPHeaderDict.add``, then the added header value will be merged in with an existing
value into a comma-separated list (``X-My-Header: foo, bar``) (`2242 <https://github.com/urllib3/urllib3/issues/2242>`__).
* Added ``NameResolutionError`` exception when a DNS error occurs (`2305 <https://github.com/urllib3/urllib3/issues/2305>`__).
* Added ``proxy_assert_hostname`` and ``proxy_assert_fingerprint`` kwargs to ``ProxyManager`` (`2409 <https://github.com/urllib3/urllib3/issues/2409>`__).
* Added a configurable ``backoff_max`` parameter to the ``Retry`` class.
If a custom ``backoff_max`` is provided to the ``Retry`` class, it
will replace the ``Retry.DEFAULT_BACKOFF_MAX`` (`2494 <https://github.com/urllib3/urllib3/issues/2494>`__).
* Added the ``authority`` property to the Url class as per RFC 3986 3.2. This property should be used in place of ``netloc`` for users who want to include the userinfo (auth) component of the URI (`2520 <https://github.com/urllib3/urllib3/issues/2520>`__).
* Added the ``scheme`` parameter to ``HTTPConnection.set_tunnel`` to configure the scheme of the origin being tunnelled to (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Added the ``is_closed``, ``is_connected`` and ``has_connected_to_proxy`` properties to ``HTTPConnection`` (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Added optional ``backoff_jitter`` parameter to ``Retry``. (`2952 <https://github.com/urllib3/urllib3/issues/2952>`__)

Changed
-------

* Changed ``urllib3.response.HTTPResponse.read`` to respect the semantics of ``io.BufferedIOBase`` regardless of compression. Specifically, this method:

* Only returns an empty bytes object to indicate EOF (that is, the response has been fully consumed).
* Never returns more bytes than requested.
* Can issue any number of system calls: zero, one or multiple.

If you want each ``urllib3.response.HTTPResponse.read`` call to issue a single system call, you need to disable decompression by setting ``decode_content=False`` (`2128 <https://github.com/urllib3/urllib3/issues/2128>`__).
* Changed ``urllib3.HTTPConnection.getresponse`` to return an instance of ``urllib3.HTTPResponse`` instead of ``http.client.HTTPResponse`` (`2648 <https://github.com/urllib3/urllib3/issues/2648>`__).
* Changed ``ssl_version`` to instead set the corresponding ``SSLContext.minimum_version``
and ``SSLContext.maximum_version`` values.  Regardless of ``ssl_version`` passed
``SSLContext`` objects are now constructed using ``ssl.PROTOCOL_TLS_CLIENT`` (`2110 <https://github.com/urllib3/urllib3/issues/2110>`__).
* Changed default ``SSLContext.minimum_version`` to be ``TLSVersion.TLSv1_2`` in line with Python 3.10 (`2373 <https://github.com/urllib3/urllib3/issues/2373>`__).
* Changed ``ProxyError`` to wrap any connection error (timeout, TLS, DNS) that occurs when connecting to the proxy (`2482 <https://github.com/urllib3/urllib3/pull/2482>`__).
* Changed ``urllib3.util.create_urllib3_context`` to not override the system cipher suites with
a default value. The new default will be cipher suites configured by the operating system (`2168 <https://github.com/urllib3/urllib3/issues/2168>`__).
* Changed ``multipart/form-data`` header parameter formatting matches the WHATWG HTML Standard as of 2021-06-10. Control characters in filenames are no longer percent encoded (`2257 <https://github.com/urllib3/urllib3/issues/2257>`__).
* Changed the error raised when connecting via HTTPS when the ``ssl`` module isn't available from ``SSLError`` to ``ImportError`` (`2589 <https://github.com/urllib3/urllib3/issues/2589>`__).
* Changed ``HTTPConnection.request()`` to always use lowercase chunk boundaries when sending requests with ``Transfer-Encoding: chunked`` (`2515 <https://github.com/urllib3/urllib3/issues/2515>`__).
* Changed ``enforce_content_length`` default to True, preventing silent data loss when reading streamed responses (`2514 <https://github.com/urllib3/urllib3/issues/2514>`__).
* Changed internal implementation of ``HTTPHeaderDict`` to use ``dict`` instead of ``collections.OrderedDict`` for better performance (`2080 <https://github.com/urllib3/urllib3/issues/2080>`__).
* Changed the ``urllib3.contrib.pyopenssl`` module to wrap ``OpenSSL.SSL.Error`` with ``ssl.SSLError`` in ``PyOpenSSLContext.load_cert_chain`` (`2628 <https://github.com/urllib3/urllib3/issues/2628>`__).
* Changed usage of the deprecated ``socket.error`` to ``OSError`` (`2120 <https://github.com/urllib3/urllib3/issues/2120>`__).
* Changed all parameters in the ``HTTPConnection`` and ``HTTPSConnection`` constructors to be keyword-only except ``host`` and ``port`` (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Changed ``HTTPConnection.getresponse()`` to set the socket timeout from ``HTTPConnection.timeout`` value before reading
data from the socket. This previously was done manually by the ``HTTPConnectionPool`` calling ``HTTPConnection.sock.settimeout(...)`` (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Changed the ``_proxy_host`` property to ``_tunnel_host`` in ``HTTPConnectionPool`` to more closely match how the property is used (value in ``HTTPConnection.set_tunnel()``) (`1985 <https://github.com/urllib3/urllib3/issues/1985>`__).
* Changed name of ``Retry.BACK0FF_MAX`` to be ``Retry.DEFAULT_BACKOFF_MAX``.
* Changed TLS handshakes to use ``SSLContext.check_hostname`` when possible (`2452 <https://github.com/urllib3/urllib3/pull/2452>`__).
* Changed ``server_hostname`` to behave like other parameters only used by ``HTTPSConnectionPool`` (`2537 <https://github.com/urllib3/urllib3/pull/2537>`__).
* Changed the default ``blocksize`` to 16KB to match OpenSSL's default read amounts (`2348 <https://github.com/urllib3/urllib3/pull/2348>`__).
* Changed ``HTTPResponse.read()`` to raise an error when calling with ``decode_content=False`` after using ``decode_content=True`` to prevent data loss (`2800 <https://github.com/urllib3/urllib3/issues/2800>`__).

Fixed
-----

* Fixed thread-safety issue where accessing a ``PoolManager`` with many distinct origins would cause connection pools to be closed while requests are in progress (`1252 <https://github.com/urllib3/urllib3/issues/1252>`__).
* Fixed an issue where an ``HTTPConnection`` instance would erroneously reuse the socket read timeout value from reading the previous response instead of a newly configured connect timeout.
Instead now if ``HTTPConnection.timeout`` is updated before sending the next request the new timeout value will be used (`2645 <https://github.com/urllib3/urllib3/issues/2645>`__).
* Fixed ``socket.error.errno`` when raised from pyOpenSSL's ``OpenSSL.SSL.SysCallError`` (`2118 <https://github.com/urllib3/urllib3/issues/2118>`__).
* Fixed the default value of ``HTTPSConnection.socket_options`` to match ``HTTPConnection`` (`2213 <https://github.com/urllib3/urllib3/issues/2213>`__).
* Fixed a bug where ``headers`` would be modified by the ``remove_headers_on_redirect`` feature (`2272 <https://github.com/urllib3/urllib3/issues/2272>`__).
* Fixed a reference cycle bug in ``urllib3.util.connection.create_connection()`` (`2277 <https://github.com/urllib3/urllib3/issues/2277>`__).
* Fixed a socket leak if ``HTTPConnection.connect()`` fails (`2571 <https://github.com/urllib3/urllib3/pull/2571>`__).
* Fixed ``urllib3.contrib.pyopenssl.WrappedSocket`` and ``urllib3.contrib.securetransport.WrappedSocket`` close methods (`2970 <https://github.com/urllib3/urllib3/issues/2970>`__)

1.26.20

====================

* Fixed a crash where certain standard library hash functions were absent in
FIPS-compliant environments.
(`3432 <https://github.com/urllib3/urllib3/issues/3432>`__)
* Replaced deprecated dash-separated setuptools entries in ``setup.cfg``.
(`3461 <https://github.com/urllib3/urllib3/pull/3461>`__)
* Took into account macOS setting ``ECONNRESET`` instead of ``EPROTOTYPE`` in
its newer versions.
(`3416 <https://github.com/urllib3/urllib3/pull/3416>`__)
* Backported changes to our tests and CI configuration from v2.x to support
testing with CPython 3.12 and 3.13.
(`3436 <https://github.com/urllib3/urllib3/pull/3436>`__)

1.26.19

====================

* Added the ``Proxy-Authorization`` header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via ``Retry.remove_headers_on_redirect``.
* Fixed handling of OpenSSL 3.2.0 new error message for misconfiguring an HTTP proxy as HTTPS. (`3405 <https://github.com/urllib3/urllib3/issues/3405>`__)
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