Log an error if non-head log file couldn't be synced to the next file's prev_file_offset position.
Log an error if non-head log file couldn't be synced to the next file's
prev_file_offset position.

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