Use transactions-updated as flush condition
Use transactions-updated as flush condition

The normal checkpointing during the block chain download is reduced
to every five minutes only, but forced every 200000 updated transactions.

Backported from bitcoin commit 25c5eca8939832e94556810ae30f1f7830e1c29c

chronokings/huntercoin,wiggi/huntercoin,fsb4000/huntercoin,fsb4000/huntercoin,chronokings/huntercoin,domob1812/huntercoin,domob1812/huntercoin,fsb4000/huntercoin,domob1812/huntercoin,fsb4000/huntercoin,wiggi/huntercoin,domob1812/huntercoin,wiggi/huntercoin,chronokings/huntercoin,wiggi/huntercoin,chronokings/huntercoin