Urllib3-future

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

* Fixed missing brackets in ``HTTP CONNECT`` when connecting to IPv6 address via
IPv6 proxy. (Issue 1222)

* Made the connection pool retry on ``SSLError``. The original ``SSLError``
is available on ``MaxRetryError.reason``. (Issue 1112)

* Drain and release connection before recursing on retry/redirect. Fixes
deadlocks with a blocking connectionpool. (Issue 1167)

* Fixed compatibility for cookiejar. (Issue 1229)

* pyopenssl: Use vendored version of ``six``. (Issue 1231)

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

* Fixed SecureTransport issue that would cause long delays in response body
delivery. (Pull 1154)

* Fixed regression in 1.21 that threw exceptions when users passed the
``socket_options`` flag to the ``PoolManager``. (Issue 1165)

* Fixed regression in 1.21 that threw exceptions when users passed the
``assert_hostname`` or ``assert_fingerprint`` flag to the ``PoolManager``.
(Pull 1157)

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

* Improved performance of certain selector system calls on Python 3.5 and
later. (Pull 1095)

* Resolved issue where the PyOpenSSL backend would not wrap SysCallError
exceptions appropriately when sending data. (Pull 1125)

* Selectors now detects a monkey-patched select module after import for modules
that patch the select module like eventlet, greenlet. (Pull 1128)

* Reduced memory consumption when streaming zlib-compressed responses
(as opposed to raw deflate streams). (Pull 1129)

* Connection pools now use the entire request context when constructing the
pool key. (Pull 1016)

* ``PoolManager.connection_from_*`` methods now accept a new keyword argument,
``pool_kwargs``, which are merged with the existing ``connection_pool_kw``.
(Pull 1016)

* Add retry counter for ``status_forcelist``. (Issue 1147)

* Added ``contrib`` module for using SecureTransport on macOS:
``urllib3.contrib.securetransport``. (Pull 1122)

* urllib3 now only normalizes the case of ``http://`` and ``https://`` schemes:
for schemes it does not recognise, it assumes they are case-sensitive and
leaves them unchanged.
(Issue 1080)

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

* Added support for waiting for I/O using selectors other than select,
improving urllib3's behaviour with large numbers of concurrent connections.
(Pull 1001)

* Updated the date for the system clock check. (Issue 1005)

* ConnectionPools now correctly consider hostnames to be case-insensitive.
(Issue 1032)

* Outdated versions of PyOpenSSL now cause the PyOpenSSL contrib module
to fail when it is injected, rather than at first use. (Pull 1063)

* Outdated versions of cryptography now cause the PyOpenSSL contrib module
to fail when it is injected, rather than at first use. (Issue 1044)

* Automatically attempt to rewind a file-like body object when a request is
retried or redirected. (Pull 1039)

* Fix some bugs that occur when modules incautiously patch the queue module.
(Pull 1061)

* Prevent retries from occurring on read timeouts for which the request method
was not in the method whitelist. (Issue 1059)

* Changed the PyOpenSSL contrib module to lazily load idna to avoid
unnecessarily bloating the memory of programs that don't need it. (Pull
1076)

* Add support for IPv6 literals with zone identifiers. (Pull 1013)

* Added support for socks5h:// and socks4a:// schemes when working with SOCKS
proxies, and controlled remote DNS appropriately. (Issue 1035)

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

* Fixed AppEngine import that didn't function on Python 3.5. (Pull 1025)

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

* urllib3 now respects Retry-After headers on 413, 429, and 503 responses when
using the default retry logic. (Pull 955)

* Remove markers from setup.py to assist ancient setuptools versions. (Issue
986)

* Disallow superscripts and other integerish things in URL ports. (Issue 989)

* Allow urllib3's HTTPResponse.stream() method to continue to work with
non-httplib underlying FPs. (Pull 990)

* Empty filenames in multipart headers are now emitted as such, rather than
being suppressed. (Issue 1015)

* Prefer user-supplied Host headers on chunked uploads. (Issue 1009)