Can no longer create a context with specific ciphers

[nick-garcia]

The recent change to remove support for Python 2.6 has made it so that the "ciphers" parameter of the create_urllib3_context function in ssl_.py no longer has any effect. The parameter is unused for the rest of the function.

This was working properly in Python 3.6, so I don't know why it was tagged as being Python 2.6 specific.

[sethmlarson]

I see what happened here, the branch for that piece of code was incorrectly marked as being for Python 2.6 only but actually was for Python 2.6+. See: cb21598#diff-7c9a38cd64066636d0e73a2449a28640L294