Offer_absolute_expiry should be used if you want to require starting at the start.
Changelog-EXPERIMENTAL: Protocol: BOLT 12 recurrence `start_any_period` removed, use expiry if you need to restrict when they can start using the offer.
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).