Speed up peg-in validation#257

Merged

instagibbs merged 2 commits intoElementsProject:elements-0.14.1from

jonasnick:getblockheader

Sep 13, 2017

Commits on Sep 11, 2017

Use getblockheader instead of getblock when checking if block is in the main chain
jonasnick
committed
Remove unnecessary genesis hash check in IsConfirmedBitcoinBlock
jonasnick
committed