luci: add server flags option and suppress some log

package/openwrt/custom.conf

@@ -1,14 +1,2 @@
 # Add custom settings here.
-
-# set log level
-# log-level [level], level=fatal, error, warn, notice, info, debug
-# log-level error
-
-# log-size k,m,g
-# log-size 128k
-
-# log-file /var/log/smartdns.log
-# log-num 2
-
-# List of hosts that supply bogus NX domain results 
-# bogus-nxdomain [ip/subnet]
+# please read https://pymumu.github.io/smartdns/config/basic-config/

package/openwrt/files/etc/init.d/smartdns

@@ -445,6 +445,9 @@ load_second_server()
 	config_get_bool "seconddns_tcp_server" "$section" "seconddns_tcp_server" "1"
 	config_get ipv6_server "$section" "ipv6_server" "1"
 
+	config_get seconddns_server_flags "$section" "seconddns_server_flags" ""
+	[ -z "$seconddns_server_flags" ] || ARGS="$ARGS $seconddns_server_flags"
+
 	conf_append_bind "$seconddns_port" "$device" "$seconddns_tcp_server" "$ipv6_server" "$ARGS"
 }