imapc: When remote IMAP server becomes confused, don't mark our indexes corrupted. Mark them corrupted only when after a reconnection the initial mailbox sync doesn't work.
imapc: When remote IMAP server becomes confused, don't mark our indexes corrupted.
Mark them corrupted only when after a reconnection the initial mailbox sync
doesn't work.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot