This doesn't happen much in real life, but it's certainly possible, so do what pay does here.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Fixes: https://github.com/ElementsProject/lightning/issues/8612
Changelog-Added: `xpay` will now wait if it suspects a payment failure is due to a height disagreement with the final node.
Any file in this directory which is executable and whose name only
consists of alphanumeric characters, space, '.', '-' or '_' will be
automatically loaded when lightningd starts (unless suppressed with
commandline options).
add398f5ea