sserver BEAM: Reduce the frequency of task delivery; Prevent too many high diff and solved shares when isEnableSimulator_ enabled.
sserver BEAM: Reduce the frequency of task delivery; Prevent too many high diff and solved shares when isEnableSimulator_ enabled.

btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool