Specifies the reason of closing IO connection

enum _PRL_IO_DISCONNECT_REASON {
  PDR_UNSPECIFIED = 0,
  PDR_RECONNECT = 1,
  PDR_HOST_USER_LOGGED_IN = 2,
  PDR_HOST_USER_INPUT_DETECTED = 3,
  PDR_ANOTHER_CLIENT_CONNECTED = 4,
  PDR_SESSION_BECOME_INACTIVE = 5
};