RabbitMQ Transport, blocked connections handling

I still think it would be beneficial for debugging/troubleshooting to have ‘connection blocked/unblocked’ events to be logged at least within the NSB as warnings

I can see how that might be useful, so I’ve opened Log blocked connections using blocked/unblocked events · Issue #468 · Particular/NServiceBus.RabbitMQ · GitHub for us to consider adding it.