Adding TLS support for redis

[irshadgit]

Redis version 6 now support TLS. Add this support in this library so that TLS enabled redis servers can be used with this library.
https://redis.io/topics/encryption
More details can be found in this stack overflow issue.

[KarelCemus]

This is just an upper layer above the redis connector therefore there must be some connector fitting the requirements of this library + implementing TLS. At this moment play-redis uses https://github.com/etaty/rediscala or its forks. Feel free to implement this feature in this connector and I can then implement it in play-redis.

Alternatively feel free to participate on providing Jedis connector implementation for play-redis, I assume Jedis supports TLS. #248

Unfortunately, I have no time to do it myself but your help would be appreciated.

I close this issue for now since it is blocked by unavailable connector implementation. Feel free to reopen any time in future when there is Jedis implementation or rediscala supports it.