Log Message:
py-OpenSSL: Update to 20.0.1

Changes:
20.0.1 (2020-12-15)
-------------------
Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^
- Fixed compatibility with OpenSSL 1.1.0.

20.0.0 (2020-11-27)
-------------------
Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- The minimum ``cryptography`` version is now 3.2.
- Remove deprecated ``OpenSSL.tsafe`` module.
- Removed deprecated ``OpenSSL.SSL.Context.set_npn_advertise_callback``, \ 
``OpenSSL.SSL.Context.set_npn_select_callback``, and \ 
``OpenSSL.SSL.Connection.get_next_proto_negotiated``.
- Drop support for Python 3.4
- Drop support for OpenSSL 1.0.1 and 1.0.2

Deprecations:
^^^^^^^^^^^^^
- Deprecated ``OpenSSL.crypto.loads_pkcs7`` and ``OpenSSL.crypto.loads_pkcs12``.

Changes:
^^^^^^^^
- Added a new optional ``chain`` parameter to ``OpenSSL.crypto.X509StoreContext()``
  where additional untrusted certificates can be specified to help chain building.
  `#948 <https://github.com/pyca/pyopenssl/pull/948>`_
- Added ``OpenSSL.crypto.X509Store.load_locations`` to set trusted
  certificate file bundles and/or directories for verification.
  `#943 <https://github.com/pyca/pyopenssl/pull/943>`_
- Added ``Context.set_keylog_callback`` to log key material.
  `#910 <https://github.com/pyca/pyopenssl/pull/910>`_
- Added ``OpenSSL.SSL.Connection.get_verified_chain`` to retrieve the
  verified certificate chain of the peer.
  `#894 <https://github.com/pyca/pyopenssl/pull/894>`_.
- Make verification callback optional in ``Context.set_verify``.
  If omitted, OpenSSL's default verification is used.
  `#933 <https://github.com/pyca/pyopenssl/pull/933>`_
- Fixed a bug that could truncate or cause a zero-length key error due to a
  null byte in private key passphrase in ``OpenSSL.crypto.load_privatekey``
  and ``OpenSSL.crypto.dump_privatekey``.
  `#947 <https://github.com/pyca/pyopenssl/pull/947>`_