So far we would call `preapproveinvoice` once for each payment split,
i.e., at least once per HTLC, and potentially more often. There is no
point in doing so repeatedly, and especially in remote signer setup
this is actually counterproductive due to the additional roundtrips.
Changelog-Changed pay: Improved performance by removing repeated `preapproveinvoice` calls
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).
8fe4196d1d