reduce the penalty for disjointed PoS header chain, because a single peer can send us a single header when chain updates to new tip
reduce the penalty for disjointed PoS header chain, because a single peer can send us a single header when chain updates to new tip

DigitalPandacoin/pandacoin,peercoin/peercoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,peercoin/peercoin,ppcoin/ppcoin,peercoin/peercoin,ppcoin/ppcoin,peercoin/peercoin,peercoin/peercoin,DigitalPandacoin/pandacoin,ppcoin/ppcoin,peercoin/peercoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin