/// <summary>This better be a SecureControl message!</summary>
    public bool HandleReply(ReqrepManager man, ReqrepManager.ReqrepType rt,
         int mid,
         PType prot,
         MemBlock payload, ISender returnpath,
         ReqrepManager.Statistics statistics,
         object state)
    {
      if(!prot.Equals(SecureControl)) {
        return true;
      }

      bool done = false;
      try {
        HandleControl(payload, returnpath);
      } catch(Exception e) {
        ProtocolLog.WriteIf(ProtocolLog.Security, e.ToString());
        done = true;
      }

      return done;
    }