Merge pull request #10125 from sangyun-han/master

update UDP client example

client/README.md

@@ -250,7 +250,8 @@ The **InfluxDB** client also supports writing over UDP.
 ```go
 func WriteUDP() {
 	// Make client
-	c, err := client.NewUDPClient("localhost:8089")
+	// PayloadSize is default value(512)
+	c, err := client.NewUDPClient(client.UDPConfig{Addr: "localhost:8089"})
 	if err != nil {
 		panic(err.Error())
 	}