Implement SIP over TLS

[cathoderaydude]

I haven't worked with SIP over TLS very much, but there might be cases where it's mandatory.

I know nothing about TLS, and I assume implementing it is a huge pain in the neck. However, once TLS itself is implemented, the complexity of the software probably doesn't increase much.

I suspect this would complicate the code so much that it would be ideal to fork the app or try to split all the TLS-related code into a separate file so that the main .py can still be easily modified by an intermediate coder.