Revert "Fixed #1494 -- switch which define we look for for SSLv3 disabled. We're now using the same one as CPython."

This reverts commit facea9a7861ac1ecc7948474766cae0f842b3469.
Merge pull request #1585 from reaperhulk/revert-1512

Revert "Fixed #1494 -- switch which define we look for for SSLv3 disable...