only stopped process or failed process allow run start 是不是应该在loadFirst判断，而不是restart

[BillXiang]

client/cmd/exec/restart.go

func restart(m *model.Process, flags string) ([]string, error) {
    // only stopped process or failed process allow run start
    if m.Status == model.StatusStopped || m.Status == model.StatusFailed {
        newData, err := reloadProcess(m, flags)
        if err != nil {
            return nil, err
        }

        return newData, nil
    }

    return nil, fmt.Errorf("the process already start")
}