Add support for MariaDB

Add support for MariaDB using MariaDB connector [1].

[1] https://github.com/MariaDB/mariadb-connector-j

Change-Id: I72496f93eb15e24093c8b9d9cda0b225342faa13
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index b0a07c7..6a01607 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -1543,6 +1543,10 @@
 +
 Connect to a MySQL database server.
 +
+* `MARIADB`
++
+Connect to a MariaDB database server.
++
 * `ORACLE`
 +
 Connect to an Oracle database server.