Enable slow send mode on beacon send failure if slowSendInterval is set to a positive number (Default: 0.0 means disabled)
In slow send mode, each time flutter-agent sends one beacon to server instead of a batch (maximum 100) of beacons.
If this beacon send succeeded, send mode is back to default pace. Otherwise beacon sending is kept in this slow mode.
Default beacon send interval is 2 seconds.
Unit of slowSendInterval is in seconds.
Slow send mode replaces traditional fail and retry approach.
Enable user session id. Default value is -1.
Negative value means user session id is enabled and remains unchanged after first creation.
A positive number means user session id is refreshed (a new one is created) after that many hours.
0.0 means user session id is disabled.