enable secure connection

[derrick56007]

#19

allows for connections to secure redis clients

[ra1u]

This looks fine. Thank you for you work.

Can you expose additional function in RedisConnection like Future<Command> connectWithSocket(Socket s) that allows injecting custom socket in similar fashion. This would allow overriding secureSocket options or using stuff like Websockets or even trying rfc1149 at some point in future without modifying current library.