Allow Redis over TLS

[christianmg99]

What does it do?

It fixes #47 by prepending tcp:// only when not present in $REDIS_FQDN already.

[ostefano]

@christianmg99 is tls://redis.example.com handled correctly by MISP itself? In other words, what about configure_misp.sh? Did you try building the image and looking at diagnostics?

[ostefano]

See comment. We need to make sure that tls:// prefixed strings are correctly managed by MISP itself.

[christianmg99]

By the time I found the replacement was in the entrypoint I had already read all Misp code regarding redis_host, and all I saw was mindful about the variable starting with tls:// such as in zmq plugin and in PHP-redis plugin, I also looked into cakePHP and it has url prefix parsers as well. I currently use it like that in a custom deployment and it works fine.

[christianmg99]

Anyways, as it is coded, you would need to prepend tls:// anyways for it to be used, so it's only for the ones who want to "force" tls use in the variable like me that will take place, everyone else will follow the standard tcp:// prepend.