Update README.md

README.md

@@ -123,7 +123,7 @@ and disable the DNS-Service in ISPConfig for the secondary dns.
 
 Example:
 ```
-var $master = '10.0.0.1';
+var $master = '10.0.0.1;';
 ```
 
 and put the IPs for the slaves into the array `$slaves`