fixed mysq database script

docs/mysql/mysql.sql

@@ -48929,6 +48929,15 @@ CREATE TABLE `User_auth` (
 
 -- --------------------------------------------------------
 
+CREATE TABLE `gateway_subnets` ( 
+  `id` INT NOT NULL AUTO_INCREMENT , 
+  `device_id` INT NULL DEFAULT NULL , 
+  `subnet_id` INT NULL DEFAULT NULL , 
+  PRIMARY KEY (`id`)
+) ENGINE = InnoDB;
+
+-- --------------------------------------------------------
+
 --
 -- Структура таблицы `User_auth_alias`
 --