Kill off SSLv3 because of the POODLE attack

For more reading on the attack:
https://www.openssl.org/~bodo/ssl-poodle.pdf
https://www.imperialviolet.org/2014/10/14/poodle.html

For more reading on the fix:
https://gist.github.com/3rd-Eden/715522f6950044da45d8
https://github.com/joyent/node/blob/v0.10.32-release/lib/tls.js#L1127
https://github.com/joyent/node/blob/7c0419730b237dbfa0ec4e6fb33a99ff01825a8f/src/node_crypto.cc#L314