Add 2.1.5 release notes

Added release notes for 2.1.5.

Documentation/Documentation-Contents.md

@@ -4,7 +4,7 @@
 ## About MariaDB MaxScale
 
  - [About MariaDB MaxScale](About/About-MaxScale.md)
- - [Release Notes](Release-Notes/MaxScale-2.1.3-Release-Notes.md)
+ - [Release Notes](Release-Notes/MaxScale-2.1.5-Release-Notes.md)
  - [Changelog](Changelog.md)
  - [Limitations](About/Limitations.md)
 

Documentation/Release-Notes/MaxScale-2.1.5-Release-Notes.md

@@ -0,0 +1,66 @@
+# MariaDB MaxScale 2.1.5 Release Notes
+
+Release 2.1.5 is a GA release.
+
+This document describes the changes in release 2.1.5, when compared to
+release [2.1.4](MaxScale-2.1.4-Release-Notes.md).
+
+If you are upgrading from release 2.0, please also read the following
+release notes:
+[2.1.4](./MaxScale-2.1.4-Release-Notes.md)
+[2.1.3](./MaxScale-2.1.3-Release-Notes.md)
+[2.1.2](./MaxScale-2.1.2-Release-Notes.md)
+[2.1.1](./MaxScale-2.1.1-Release-Notes.md)
+[2.1.0](./MaxScale-2.1.0-Release-Notes.md)
+
+For any problems you encounter, please consider submitting a bug
+report at [Jira](https://jira.mariadb.org).
+
+## Changed Features
+
+### Schemarouter
+
+Starting with MaxScale 2.1.5, the _schemarouter_ will prioritize the current
+database over an explicit database if tables in the the current database are
+used in a query.
+
+## New Features
+
+### Schemarouter
+
+A new parameter for the _schemarouter_ was added that allows deterministic
+resolution of database mapping conflicts (i.e. the database exists on more than
+one backend server).
+
+The new `preferred_server` parameter takes a server name as its value. If a
+database mapping conflict occurs, the server given as the parameter will have
+preference. In practice, this means that databases on a central server can be
+replicated to the shards for doing JOINs but writes to the replicate database
+will still go to the central database.
+
+## Bug fixes
+
+[Here is a list of bugs fixed since the release of MaxScale 2.1.4.]
+(https://jira.mariadb.org/issues/?jql=project%20%3D%20MXS%20AND%20issuetype%20%3D%20Bug%20AND%20status%20%3D%20Closed%20AND%20fixVersion%20%3D%202.1.5)
+
+* [MXS-1310](https://jira.mariadb.org/browse/MXS-1310) schemarouter ignores local copy of duplicate schemas on JOIN
+
+## 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 the Linux distributions supported
+by MariaDB Enterprise.
+
+Packages can be downloaded [here](https://mariadb.com/resources/downloads).
+
+## 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.
+
+The source code is available [here](https://github.com/mariadb-corporation/MaxScale).