Added optional parameters for services that allow all servers to be used when building the list of users.

server/include/service.h

@@ -136,6 +136,7 @@ typedef struct service {
 			svc_config_param;     /*<  list of config params and values */
 	int             svc_config_version;   /*<  Version number of configuration */
 	bool            svc_do_shutdown;	/*< tells the service to exit loops etc. */
+        bool            users_from_all;         /*< Load users from one server or all of them */
 	SPINLOCK
 			users_table_spin;	/**< The spinlock for users data refresh */
 	SERVICE_REFRESH_RATE