code: func (mi *MetaInfo) SetDefaults() {
  	mi.Comment = "yoloham"
  	mi.CreatedBy = "github.com/anacrolix/torrent"
  	mi.CreationDate = time.Now().Unix()
  	// mi.Info.PieceLength = 256 * 1024
  }
docs: // Set good default values in preparation for creating a new MetaInfo file.