-- Database schema changes: the size and mtime columns were added to the
-- segments table, and the segments_used table was added. Rather than upgrade
-- the segments table in-place, we create a new table and then rename it over
-- Database schema changes: the size and mtime columns were added to the
-- segments table, and the segments_used table was added. Rather than upgrade
-- the segments table in-place, we create a new table and then rename it over