Update Readme

README.md

@@ -47,6 +47,7 @@ This application is an Add-ons for ISPConfig used for VPS Management (Proxmox)
  - $conf["pve_link"] 		= 'hostname / ip of your cluster head';
  - $conf["pve_realm"] 		= 'realm';
 - Create MySQL table for this module -> misc/vm_proxmox.sql
+ - If you are on multi-servers setup you have to do this on each server
 
 
 ## ToDo