The wire protocol uses this, in the assumption that we'll never see feerates in excess of 4294967 satoshi per kiloweight. So let's use that consistently internally as well. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We leave the *build* results in lightningd/ for ease of in-place testing though. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>