Flags which determines peer client while login to dispatcher and while attach to vm.

enum _PRL_IO_CLIENT_FLAGS {
  PCF_ORIGINAL_CLIENT = 1<<(PACF_MAX+1),
  PCF_LIGHTWEIGHT_CLIENT = 1<<(PACF_MAX+2),
  PCF_TRUSTED_CHANNEL = 1<<(PACF_MAX+3),
  PCF_TERMINAL_CLIENT = 1<<(PACF_MAX+4)
};