Update changelog and release notes of 2.0.4

Documentation/Changelog.md

@@ -11,6 +11,7 @@
   as JSON objects (beta level functionality).
 
 For more details, please refer to:
+* [MariaDB MaxScale 2.0.4 Release Notes](Release-Notes/MaxScale-2.0.4-Release-Notes.md)
 * [MariaDB MaxScale 2.0.3 Release Notes](Release-Notes/MaxScale-2.0.3-Release-Notes.md)
 * [MariaDB MaxScale 2.0.2 Release Notes](Release-Notes/MaxScale-2.0.2-Release-Notes.md)
 * [MariaDB MaxScale 2.0.1 Release Notes](Release-Notes/MaxScale-2.0.1-Release-Notes.md)

Documentation/Release-Notes/MaxScale-2.0.4-Release-Notes.md

@@ -0,0 +1,49 @@
+# MariaDB MaxScale 2.0.4 Release Notes
+
+Release 2.0.4 is a GA release.
+
+This document describes the changes in release 2.0.4, when compared to
+release [2.0.3](MaxScale-2.0.3-Release-Notes.md).
+
+If you are upgrading from release 1.4, please also read the release
+notes of release [2.0.3](./MaxScale-2.0.3-Release-Notes.md),
+release [2.0.2](./MaxScale-2.0.2-Release-Notes.md),
+release [2.0.1](./MaxScale-2.0.1-Release-Notes.md) and
+[2.0.0](./MaxScale-2.0.0-Release-Notes.md).
+
+For any problems you encounter, please submit a bug report at
+[Jira](https://jira.mariadb.org).
+
+## Changed Features
+
+- The dbfwfilter now rejects all prepared statements instead of ignoring
+  them. This affects _wildcard_, _columns_, _on_queries_ and _no_where_clause_
+  type rules which previously ignored prepared statements.
+
+## Bug fixes
+
+[Here](https://jira.mariadb.org/issues/?jql=project%20%3D%20MXS%20AND%20issuetype%20%3D%20Bug%20AND%20status%20%3D%20Closed%20AND%20fixVersion%20%3D%202.0.4)
+is a list of bugs fixed since the release of MaxScale 2.0.3.
+
+* [MXS-1082](https://jira.mariadb.org/browse/MXS-1082): Block prepared statements
+* [MXS-1080](https://jira.mariadb.org/browse/MXS-1080): Readwritesplit (documentation of max_slave_replication_lag)
+
+## 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 derived
+from 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).