return a requested block/transaction. Make this time dependent on the actual block
interval. This should allow the the node to give up and request the block from
another peer before the ~30 second undo interval has passed.
Fix the merkle root calculation to avoid reading
past the end of a vector. Modify the algorithm to do what was likely intended
(this modification is currently disabled because it will yield different results
than the currently-running testnet)
Fix windows build errors.
Re-enable shutdown in node code which was causing some (not all) of the
errors in two_node_network test #55, and likely occasional crashes at
shutdown for the witness node
