Preserve client sent config appropriately (#8566)

cmd/config/config.go

@@ -466,14 +466,10 @@ func (c Config) SetKVS(s string, defaultKVS map[string]KVS) error {
 		tgt = subSystemValue[1]
 	}
 
-	_, ok := c[subSys][tgt]
+	// Save client sent kvs
-	if !ok {
+	c[subSys][tgt] = kvs
-		c[subSys][tgt] = KVS{}
-	} else {
-		c[subSys][tgt] = kvs
-	}
 
-	_, ok = c[subSys][tgt].Lookup(State)
+	_, ok := c[subSys][tgt].Lookup(State)
 	if !ok {
 		// implicit state "on" if not specified.
 		c[subSys][tgt] = append(c[subSys][tgt], KV{

cmd/config/notify/parse.go

@@ -564,6 +564,7 @@ func GetNotifyMQTT(mqttKVS map[string]config.KVS, rootCAs *x509.CertPool) (map[s
 		if k != config.Default {
 			brokerEnv = brokerEnv + config.Default + k
 		}
+
 		brokerURL, err := xnet.ParseURL(env.Get(brokerEnv, kv.Get(target.MqttBroker)))
 		if err != nil {
 			return nil, err