The semantics of the rlEventsMask is an array of timestamps (each 4 octets
containing one time stamp). Each timestamp is in TimeTicks units encoded in network order.
Thus the mask can contain up to 40 timestamps. If a place in the array is empty it will contain
0.
Each timestamp shows the time of the last occurrence of the event whose
rlEventIndexKey in the rlEventsTable for this client id is the same as its index in the array.
Each for bytes of the rlEventsMask will contain the timestamp in TimeTicks
units encoded in network order of the last time the event