rabbitmq.conf in 3.11.x supports environment variable interpolation

[michaelklishin]

@yosifkit @tianon FYI, modern RabbitMQ versions support env variable interpolation in rabbitmq.conf.

I've missed this feature but it's been in place in our config parser (Cuttlefish) since early 2021.

I would still not recommend using environment variables heavily where rabbitmq.conf or definitions would do but it might
be useful to some image users, so I'm making sure that you are aware of this feature :)

[tianon]

Thanks for the heads up! 🙇