Document `OP_REDIS_*` variables

[alicethorne-ab]

As part of v2.8.5, the environment variables related to redis were undeprecated and reintroduced as configuration options. We need to document those variables.

These include:

• OP_REDIS_HOST - setting the redis hostname (i.e: localhost)
• OP_REDIS_PORT - setting the redis port (i.e: 6379)
• OP_REDIS_USERNAME - setting the username used to connect to redis (i.e: admin)
• OP_REDIS_PASSWORD - setting the password used to connect to redis (i.e: hunter2)
• OP_REDIS_SSL_ENABLED - setting whether the connection should be SSL-enabled (0 or 1 (boolean))
• OP_REDIS_INSECURE_SSL - setting whether insecure SSL connections should be allowed when OP_REDIS_SSL_ENABLED is also enabled (0 or 1 (boolean))

Also of note is that a user must unset OP_REDIS_URL for these to be used. In other words, if OP_REDIS_URL is set, none of the other OP_REDIS_* variables will be used.

[scottisloud]

For the moment, I'll set all configuration manifests to continue to use OP_REDIS_URL, since that's the most common way people will continue to deploy the bridge. I'll include example-specific documentation and add the variables to the manifests empty/commented out/etc where possible.

[alicethorne-ab]

OP_REDIS_INSECURE_SSL has been implemented as of v2.9.0 and can be included in documentation now. 🙂