Review fixes: at settle a certain answer ends the wait only when the
lookup found a record or the answer is the inspector's or the recorded
saver's; the legacy floor waits for the re-check. A record without a
certain prompt ends the wait at once. Foreign writes need both
save_foreign_runs and monitoring_enabled, read again just before the
store. Dropped foreign files are logged outside the lock (evictions as
evictions, due ones too), and a drained re-check never drops a newer
reference.
Vito Sansevero
0d0ffc4ad8