Otherwise valgrind tells you when you test a hash; you want to
know if you hash uninitialized memory long before that.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's not clear it's needed, and without it there's a good reason to
delay dumping to the blockchain if a node becomes unreachable (since
you'll get your money faster if it comes back online).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
