tls: TLSSocket options not initialized

[jasnell]

Per: nodejs/node-v0.x-archive#7218 by @adammw

This was a PR originally opened against joyent/node but never landed. On the
TLSSocket constructor, the options parameter is not verified to be undefined and
the code assume's it's not. The PR was originally reviewed by @indutny but had
some issues that were never fully resolved. The PR would need to be reopened
here and updated before it can land.

[kulkarniankita]

If no one else has picked this up, can I work on this?

[jhamhader]

I'm on it, and my PR is waiting for merge :)

[jhamhader]

Landed on #2614

[evanlucas]

This was landed in adfd20b