Re-arrange 4.0 release notes

Author: michaelklishin

release-notes/4.0.0.md

@@ -25,14 +25,14 @@ Some key improvements in this release are listed below.
 
 See Compatibility Notes below to learn about **breaking or potentially breaking changes** in this release.
 
-## Release Artifacts
-
-RabbitMQ releases are distributed via [GitHub](https://github.com/rabbitmq/rabbitmq-server/releases).
-[Debian](https://rabbitmq.com/install-debian.html) and [RPM packages](https://rabbitmq.com/install-rpm.html) are available via Cloudsmith mirrors.
-
-[Community Docker image](https://hub.docker.com/_/rabbitmq/), [Chocolatey package](https://community.chocolatey.org/packages/rabbitmq), and the [Homebrew formula](https://www.rabbitmq.com/docs/install-homebrew)
-are other installation options. They are updated with a delay.
+## Breaking Changes and Compatibility Notes
 
+* RabbitMQ 3.13 [rabbitmq.conf](https://www.rabbitmq.com/docs/configure#config-file) settings `mqtt.default_user`, `mqtt.default_password`, and `amqp1_0.default_user` are unsupported in RabbitMQ 4.0
+  Instead, set the new RabbitMQ 4.0 settings `anonymous_login_user` and `anonymous_login_pass` (both values default to `guest`).
+  For production scenarios, [disallow anonymous logins](https://www.rabbitmq.com/docs/next/production-checklist#anonymous-login)
+* RabbitMQ 3.13 `rabbitmq.conf` setting `rabbitmq_amqp1_0.default_vhost` is unsupported in RabbitMQ 4.0.
+  Instead `default_vhost` will be used to determine the default vhost an AMQP 1.0 client connects to(i.e. when the AMQP 1.0 client does not define the vhost in the `hostname` field of the `open` frame)
+* RabbitMQ Shovels will be able connect to a RabbitMQ 4.0 node via AMQP 1.0 only when the Shovel runs on a RabbitMQ node >= `3.13.7`
 
 ## Erlang/OTP Compatibility Notes
 
@@ -42,6 +42,15 @@ This release [requires Erlang 26.2](https://www.rabbitmq.com/docs/which-erlang).
 what package repositories and tools can be used to provision latest patch versions of Erlang 26.x.
 
 
+## Release Artifacts
+
+RabbitMQ releases are distributed via [GitHub](https://github.com/rabbitmq/rabbitmq-server/releases).
+[Debian](https://rabbitmq.com/install-debian.html) and [RPM packages](https://rabbitmq.com/install-rpm.html) are available via Cloudsmith mirrors.
+
+[Community Docker image](https://hub.docker.com/_/rabbitmq/), [Chocolatey package](https://community.chocolatey.org/packages/rabbitmq), and the [Homebrew formula](https://www.rabbitmq.com/docs/install-homebrew)
+are other installation options. They are updated with a delay.
+
+
 ## Upgrading to 4.0
 
 ### Documentation guides on upgrades
@@ -81,15 +90,6 @@ TBD
 
 TBD
 
-## Breaking Changes
-
-* RabbitMQ 3.13 [rabbitmq.conf](https://www.rabbitmq.com/docs/configure#config-file) settings `mqtt.default_user`, `mqtt.default_password`, and `amqp1_0.default_user` are unsupported in RabbitMQ 4.0.
-Instead, set the new RabbitMQ 4.0 settings `anonymous_login_user` and `anonymous_login_pass` (both values default to `guest`).
-For production scenarios, [disallow anonymous logins](https://www.rabbitmq.com/docs/next/production-checklist#anonymous-login).
-* RabbitMQ 3.13 `rabbitmq.conf` setting `rabbitmq_amqp1_0.default_vhost` is unsupported in RabbitMQ 4.0.
-Instead `default_vhost` will be used to determine the default vhost an AMQP 1.0 client connects to (i.e. when the AMQP 1.0 client does not define the vhost in the `hostname` field of the `open` frame).
-* RabbitMQ shovels can connect to a RabbitMQ 4.0 node via AMQP 1.0 only when the shovel runs on a RabbitMQ node >= 3.13.7
-
 ### Dependency Changes
 
  * Ra was [upgraded to `2.13.5`](https://github.com/rabbitmq/ra/releases)