Remove https core module patching logic

[TooTallNate]

Instead of patching over https.request() and https.get() manually
to add the secureEndpoint boolean, utilize the stack trace of the
current call logic to determine whether or not the https.js core
module is invoking new ClientRequest().

In theory, this is still fragile logic, but should be more future-proof
and cleaner than patching over a core module, which is never really
desirable.

Fixes #23.
Fixes #29.
Closes #30.
Closes #35.