Merge branch '2.2' into 2.3

Documentation/Release-Notes/MaxScale-2.2.18-Release-Notes.md

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+# MariaDB MaxScale 2.2.18 Release Notes -- 2018-12-13
+
+Release 2.2.18 is a GA release.
+
+This document describes the changes in release 2.2.18, when compared to the
+previous release in the same series.
+
+For any problems you encounter, please consider submitting a bug
+report on [our Jira](https://jira.mariadb.org/projects/MXS).
+
+## Bug fixes
+
+* [MXS-2221](https://jira.mariadb.org/browse/MXS-2221) Fatal signal handling does not always create a core
+* [MXS-2216](https://jira.mariadb.org/browse/MXS-2216) Read past stack buffer
+* [MXS-2213](https://jira.mariadb.org/browse/MXS-2213) Growing memory consumption with 2.2.17
+* [MXS-2207](https://jira.mariadb.org/browse/MXS-2207) qc_mysqlembedded does not classify SET STATEMENT ... FOR UPDATE correctly.
+* [MXS-2183](https://jira.mariadb.org/browse/MXS-2183) Excessive memory use, but not growing endlessly
+
+## Known Issues and Limitations
+
+There are some limitations and known issues within this version of MaxScale.
+For more information, please refer to the [Limitations](../About/Limitations.md) document.
+
+## Packaging
+
+RPM and Debian packages are provided for supported the Linux distributions.
+
+Packages can be downloaded [here](https://mariadb.com/downloads/mariadb-tx/maxscale).
+
+## Source Code
+
+The source code of MaxScale is tagged at GitHub with a tag, which is identical
+with the version of MaxScale. For instance, the tag of version X.Y.Z of MaxScale
+is `maxscale-X.Y.Z`. Further, the default branch is always the latest GA version
+of MaxScale.
+
+The source code is available [here](https://github.com/mariadb-corporation/MaxScale).