WHAT

In the kafka-group-authorizer plugin, we use custom broker properties that have a "strimzi" prefix. E.g.:

strimzi.authorization.custom-authorizer.allowed-listeners=plain-9092,canary-9096

It should instead use a different prefix.   

We will need a complementary change to kas-fleetshard to initially support the new properties and then a follow on change to remove the old ones.

WHY

It's not part of the Strimzi project, and might not ever be.

HOW

Possibly by adding support for a different prefix (while still supporting the old one for compatibility). Update README, and also get fleetshard operator to replace the properties in the Kafka CR with the new names.