- Remove unneeded BuildRequires of mock.

- Remove unbundling off ssl.match_hostname.
* It was only done for the primary python3 flavor
* It is bundled for a reason gh#urllib3/urllib3#2439,
gh#urllib3/urllib3#2448
* The tests (and probably urllib3 users) use wildcard patterns
not supported by the stdlib
- Fix undbundling of six for all flavors
- Replace brotlipy recommendation and test with python-Brotli
(see release notes below)

- update to 1.26.9:
* Changed ``urllib3[brotli]`` extra to favor installing Brotli libraries that are still
receiving updates like ``brotli`` and ``brotlicffi`` instead of ``brotlipy``.
This change does not impact behavior of urllib3, only which dependencies are installed.
* Fixed a socket leaking when ``HTTPSConnection.connect()`` raises an exception.
* Fixed ``server_hostname`` being forwarded from ``PoolManager`` to ``HTTPConnectionPool``
when requesting an HTTP URL. Should only be forwarded when requesting an HTTPS URL.

- update to 1.26.8:
* Added extra message to``urllib3.exceptions.ProxyError`` when urllib3 detects that
a proxy is configured to use HTTPS but the proxy itself appears to only use HTTP.
* Added a mention of the size of the connection pool when discarding a
connection due to the pool being full.
* Added explicit support for Python 3.11.
* Deprecated the ``Retry.MAX_BACKOFF`` class property in favor of
``Retry.DEFAULT_MAX_BACKOFF`` to better match the rest of the default parameter names.
``Retry.MAX_BACKOFF`` is removed in v2.0.
* Changed location of the vendored ``ssl.match_hostname`` function from