新增内部消息站内信功能。

modules/core/db/db2/core.sql

@@ -481,13 +481,13 @@ CREATE TABLE js_sys_msg_inner
 	content_type char(1),
 	msg_content clob NOT NULL,
 	receive_type char(1) NOT NULL,
-	receive_codes clob NOT NULL,
-	receive_names clob NOT NULL,
-	send_user_code varchar(64) NOT NULL,
-	send_user_name varchar(100) NOT NULL,
-	send_date timestamp NOT NULL,
+	receive_codes clob,
+	receive_names clob,
+	send_user_code varchar(64),
+	send_user_name varchar(100),
+	send_date timestamp,
 	is_attac char(1),
-	notify_types varchar(100) NOT NULL,
+	notify_types varchar(100),
 	status char(1) NOT NULL,
 	create_by varchar(64) NOT NULL,
 	create_date timestamp NOT NULL,