Force SSLv3 in Node.js samples for compatibility with Mobage

Node.js' https module defaults to SSLv2, which Mobage does not currently support. As a result, the Node.js samples are unable to connect to Mobage, and they eventually fail with the error ECONNRESET.

The solution is to force the global HTTPS agent to use SSLv3. I've verified that this pull request fixes the connection error (at least on OS X).