TLS and Custom Port Support

What's Changed

• Speed up load times and improve logging on join events by @aronson in #42
• Support TLS connections and custom ports by @aronson in #41

To enable TLS, provided your IRC server supports it, configure like so (changing the port to the TLS port provided by your IRC server admins):

{
  // ...
  "tls": true, // false by default
  "port": 6697 // common port for IRC over TLS
  // ...
}

Full Changelog: 4.9.0...4.9.1