Hostname IP matching

[shin-]

See discussion in docker/compose#3226

Fixes #731
Fixes #706

[endophage]

Thank you! ssl_match_hostname.py plus tests LGTM. Can't speak to the requirements changes et al.

[aanand]

Does this also mean we can stop passing assert_hostname=False in Compose's docker_client.py, since the IP addresses of Machine VMs will now be correctly matched?

LGTM

[tombee]

Awesome work @shin-!

[FiloSottile]

This seems not to work for me on OS X.

https://gist.github.com/FiloSottile/d308789cc7a8f1de8f36a127ecfbff19

The version is 1.8.0, the CLI works, the certificate has the IP on it, but it still raises requests.exceptions.SSLError: hostname '192.168.64.6' doesn't match 'localhost'

[FiloSottile]

Interestingly, patching the function to print the certificate yields

{'subjectAltName': [('DNS', 'localhost')], 'subject': ((('commonName', None),),)}

so it's a parsing problem, not a matching one. I'll open a new issue.