lib-index: modseq -> {log file, offset} lookup often ignored dovecot.index.log.2 This caused the code to think that the modseq was too old and fall back into slower sync.
lib-index: modseq -> {log file, offset} lookup often ignored dovecot.index.log.2
This caused the code to think that the modseq was too old and fall back into
slower sync.

So this change should fix the dsync "Modseq .. nom longer in transaction
log" warnings as well as improve IMAP QRESYNC efficiency.

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch