fix client error message

remoting/getty/getty_client.go

@@ -40,7 +40,7 @@ import (
 var (
 	errSessionNotExist               = perrors.New("session not exist")
 	errClientClosed                  = perrors.New("client closed")
-	errClientReadTimeoutOrDecoedFail = perrors.New("client read timeout or decode pkg fail")
+	errClientReadTimeoutOrDecoedFail = perrors.New("maybe the client read timeout or fail to decode tcp stream in Writer.Write")
 
 	clientConf   *ClientConfig
 	clientGrpool *gxsync.TaskPool