1. Support tailgating detection in memory mode.

2. Improve the open door speed when in free pass mode.

3. Support cross-controller anti-passback.
(1) Base on network, one device need to be set as server device , other remian in normal device.
(2) If normal device disconnected with server device,  cross-controller anti-passback rule will be disabled automatically, and recover rules afetr reconnected to server device again.