TlsStream implementation

[howardmoore]

Have you considered switching to use tokio_native_tls rather than tokio_tls for your TlsStream? I'm not sure why tokio has too, seemingly similar, implementations but tokio_native_tls has the advantage for me that it allows you to get the peer_certificate from the underlying native_tls stream.

[LucioFranco]

@howardmoore we do want to upgrade to this just lacking the time currently.