Python and OpenSSL version reference issue on OS X

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Use this as a workaround:

export CRYPTOGRAPHY_ALLOW_OPENSSL_098=1

This appears to be a recent check of the hazmat cryptography library. You can see the source code at:

https://github.com/pyca/cryptography/blob/master/src/cryptography/hazmat/bindings/openssl/binding.py#L221

The CRYPTOGRAPHY_ALLOW_OPENSSL_098 environment variable downgrades the error to a deprecation warning, if you are willing to take the risk. I also ran into this on OS X in just the past day, so something changed recently.

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