Support TLS Connections

[mmmries]

No description provided.

[mmmries]

I got a quick proof-of-concept working for upgrading the tcp connection to SSL. I'm going to wait for #36 to get merged before I start full support though since all of the handshake code is still in flux

require Logger

{:ok, tcp} = :gen_tcp.connect('127.0.0.1', 4222, [:binary])
receive do
  {:tcp, _port, "INFO "<>_} -> :cool
  other -> Logger.error "unexpected message: #{inspect other}"
  after 500 -> raise "didn't receive INFO"
end

:ok = :inet.setopts(tcp, [active: true])
case :ssl.connect(tcp, [], 1_000) do
  {:ok, port} -> :cool
  other -> Logger.error "unexpected message: #{inspect other}"
  {:error, why} -> raise "SSL handshake failed: #{inspect why}"
end

Logger.info "finished ssl handshake"