Initial 3.9.26 release notes

release-notes/3.9.26.md

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+RabbitMQ `3.9.26` is a maintenance release in the `3.9.x` release series.
+
+Please refer to the **Upgrading to 3.9** section from [v3.9.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.9.0) if upgrading from a version prior to 3.9.0.
+
+This release requires at least Erlang 24.2, and supports Erlang 25. [RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on Erlang version requirements for RabbitMQ.
+
+
+### Minimum Supported Erlang Version
+
+Erlang 23 support has reached its [end of support](https://www.rabbitmq.com/which-erlang.html).
+
+Starting with this release, RabbitMQ requires Erlang 24.2 or later versions. Nodes **will fail to start** on older Erlang releases.
+
+## Changes Worth Mentioning
+
+Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.9.x/release-notes).
+
+
+### Core Server
+
+#### Bug Fixes
+
+ * Fixed a type analyzer definition.
+
+   Contributed by @illotum (AWS).
+
+   GitHub issue: [#6401](https://github.com/rabbitmq/rabbitmq-server/pull/6401)
+
+
+### LDAP Plugin
+
+#### Bug Fixes
+
+ * LDAP server password could end up in the logs in certain types of exceptions.
+
+   Contributed by @SimonUnge (AWS).
+
+   GitHub issue: [#4842](https://github.com/rabbitmq/rabbitmq-server/issues/4842)
+
+
+## Dependency Upgrades
+
+None in this release.
+
+
+## Source Code Archives
+
+To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.9.26.tar.xz`
+instead of the source tarball produced by GitHub.