Update README.md

Author: mevdschee

README.md

@@ -828,13 +828,10 @@ I am testing mainly on Ubuntu and I have the following test setups:
 
   - Ubuntu 12.04 Server with PHP 5.3 and MySQL 5.5 and PostgreSQL 9.1
   - Ubuntu 14.04 Server with PHP 5.5 and MySQL 5.5 and PostgreSQL 9.3
-  - Ubuntu 16.04 Server with PHP 7.0 and MySQL 5.7 and PostgreSQL 9.5
-  - Ubuntu 16.04 Server with PHP 7.0 and MariaDB 10.0 and PostgreSQL 9.5
+  - Ubuntu 16.04 Server with PHP 7.0 and MySQL 5.7 / MariaDB 10.0 and PostgreSQL 9.5
   - Debian 7 Server with PHP 5.4 and MySQL 5.5 and PostgreSQL 9.1
-  - Debian 8 Server with PHP 5.6 and MySQL 5.5 and PostgreSQL 9.4
-  - Debian 8 Server with PHP 5.6 and MariaDB 10.0 and PostgreSQL 9.4
-  - Debian 9 Server with PHP 7.0 and MySQL 5.5 and PostgreSQL 9.6
-  - Debian 9 Server with PHP 7.0 and MariaDB 10.1 and PostgreSQL 9.6
+  - Debian 8 Server with PHP 5.6 and MySQL 5.5 / MariaDB 10.0 and PostgreSQL 9.4
+  - Debian 9 Server with PHP 7.0 and MySQL 5.5 / MariaDB 10.1 and PostgreSQL 9.6
   - CentOS 7 Server with PHP 5.4 and MySQL 5.5 and PostgreSQL 9.2
   - Windows 2012 R2 with PHP 5.6 and SQL Server 2012