network save/restore: merge fixes, simpler code, limit parse of require flag to peers (reflecting save code).
network save/restore: merge fixes, simpler code, limit parse of require flag to peers (reflecting save code).

chriseth/solidity,vaporry/solidity,arkpar/solidity,debris/solidity,chriseth/solidity-doc-test,ruchevits/solidity,ruchevits/solidity,LianaHus/solidity,ruchevits/solidity,ruchevits/solidity,gluk256/solidity,shahankhatch/solidity,douglas-larocca/solidity,ethers/solidity