Feature : Improve the libp2p synchronization speed

[Wawa1996]

Improve the synchronization speed, modify the synchronization protocol

[Wawa1996]

How to find a common ancestor?
Determine the number of blocks that need to be synchronized in the mining pool through a high degree, and keep up with the latest global state by packing a certain number of blocks each time

[Wawa1996]

How to deal with the new block received by the synchronizing mining pool?
Find the parent block by hashing, and there is no parent block of the newly generated block in the synchronizing mining pool. Therefore, the newly generated block is stored in the memory without processing until the synchronized mining pool is updated to the latest state.