其他：调整分片文件名格式

Author: yoonper

writer.go

@@ -67,7 +67,7 @@ func (w *writer) open() error {
 
 	var err error
 	time.Sleep(time.Microsecond) // keep unique
-	name := path.Join(Config.Path, fmt.Sprintf("%013d.data", time.Now().UnixMicro()))
+	name := path.Join(Config.Path, fmt.Sprintf("%016d.data", time.Now().UnixMicro()))
 	if w.file, err = os.OpenFile(name, os.O_CREATE|os.O_WRONLY, Config.FilePerm); err != nil {
 		return err
 	}