- update to 1.16:
* Disable IPv6 DNS when IPv6 connections are not possible. (Issue #840)
* Provide ``key_fn_by_scheme`` pool keying mechanism that can be
overridden. (Issue #830)
* Normalize scheme and host to lowercase for pool keys, and include
``source_address``. (Issue #830)
* Cleaner exception chain in Python 3 for ``_make_request``.
(Issue #861)
* Fixed installing ``urllib3[socks]`` extra. (Issue #864)
* Fixed signature of ``ConnectionPool.close`` so it can actually safely be
called by subclasses. (Issue #873)
* Retain ``release_conn`` state across retries. (Issues #651, #866)
* Add customizable ``HTTPConnectionPool.ResponseCls``, which defaults to
``HTTPResponse`` but can be replaced with a subclass. (Issue #879)
- Use pypi.io as Source url

- update to 1.15.1:
* Fix packaging to include backports module. (Issue #841)
* Added Retry(raise_on_status=False). (Issue #720)
* Always use setuptools, no more distutils fallback. (Issue #785)
* Dropped support for Python 3.2. (Issue #786)
* Chunked transfer encoding when requesting with ``chunked=True``.
* Fixed regression with IPv6 port parsing. (Issue #801)
* Append SNIMissingWarning messages to allow users to specify it in
the PYTHONWARNINGS environment variable. (Issue #816)
* Handle unicode headers in Py2. (Issue #818)
* Log certificate when there is a hostname mismatch. (Issue #820)
* Preserve order of request/response headers. (Issue #821)

- change Requires on pyopenssl, pyasn1 into Recommends,