Typo: josn => json (#2429)

pkg/config/client.go

@@ -34,7 +34,7 @@ type ClientCommonConf struct {
 
 	// ServerAddr specifies the address of the server to connect to. By
 	// default, this value is "0.0.0.0".
-	ServerAddr string `ini:"server_addr" josn:"server_addr"`
+	ServerAddr string `ini:"server_addr" json:"server_addr"`
 	// ServerPort specifies the port to connect to the server on. By default,
 	// this value is 7000.
 	ServerPort int `ini:"server_port" json:"server_port"`