Message 272749 - Python tracker

So, for servers really what we care about is if the _client_ has PCLMULQDQ/AESNI, not whether the server itself does. Unfortunately, there's no sane way to do this.

Haven't reviewed this patch in terribly much detail, but conceptually fine. Cory, we should make sure this type of change propogates its way through requests, urllib3, hynek's blog post, and whatever else has a copy-pasted ciphersuite string.