Enable TLS connection for Redis

[Ziris85]

Hello!

This is a hopefully simple PR to allow users to configure Redis to connect to a TLS-enabled Redis endpoint. It proposes a new environment variable REDIS_PROTOCOL that can be passed to the container, and replaces all areas (that I found) where tcp:// was either hard-coded or the assumed (omitted) default. All adjustments will continue to use tcp as the default if the env var isn't passed, so this shouldn't impact existing installations.

I don't do PR's very frequently so apologies if I missed something here, but I'm interested in thoughts/feedback!

Thank you!

[LordRobinCbz]

Hello,

I was here to add this feature, but you've done it.
Do you think tat you can add suport for mTLS to ?

Seems not complicated if cert,key and ca are given with base64 string.
With something like REDIS_CLIENT_CERT_BASE64 and so on ?

[LordRobinCbz]

I will probably add support for mTLS with Mariadb to ...

[J0WI]

Needs documentation in REDME

[Ziris85]

Good point @J0WI , thanks! Just updated README for that.

[geidsonc]

This merge is of public interest. Why hasn't it been accepted yet?

[Ziris85]

Is this waiting on me for anything? I'll be happy to fix/update whatever else is necessary to get this finished 🙂

[J0WI]

It needs rebase. Please only commit the docker-entrypoint.sh in the Git root, the other files are just generated.