[issue16113] Add SHA-3 (Keccak) support

[Richard Oudkerk]

Richard Oudkerk added the comment:

_sha3 is not being built on Windows, so importing hashlib fails

>>> import hashlib
ERROR:root:code for hash sha3_224 was not found.
Traceback (most recent call last):
  File "C:\Repos\cpython-dirty\lib\hashlib.py", line 109, in __get_openssl_constructor
    f = getattr(_hashlib, 'openssl_' + name)
AttributeError: 'module' object has no attribute 'openssl_sha3_224'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Repos\cpython-dirty\lib\hashlib.py", line 154, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "C:\Repos\cpython-dirty\lib\hashlib.py", line 116, in __get_openssl_constructor
    return __get_builtin_constructor(name)
  File "C:\Repos\cpython-dirty\lib\hashlib.py", line 104, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type sha3_224
...

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nosy: +sbt

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16113>
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