xl2tpd: demand option is initialized.

Signed-off-by: mogulapranay <mogulapranay57@gmail.com>

net/xl2tpd/files/l2tp.sh

@@ -14,6 +14,7 @@ proto_l2tp_init_config() {
 	proto_config_add_string "keepalive"
 	proto_config_add_string "pppd_options"
 	proto_config_add_boolean "ipv6"
+	proto_config_add_int "demand"
 	proto_config_add_int "mtu"
 	proto_config_add_int "checkup_interval"
 	proto_config_add_string "server"