[dovecot/core] 03af8e: dsync: Don't export header hashes if remote mailbo...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 03af8e5325a7b4fec36414ac35949457bc426c0b
      https://github.com/dovecot/core/commit/03af8e5325a7b4fec36414ac35949457bc426c0b
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-04-12 (Tue, 12 Apr 2016)

  Changed paths:
    M src/doveadm/dsync/dsync-brain-mailbox.c
    M src/doveadm/dsync/dsync-mailbox-export.c
    M src/doveadm/dsync/dsync-mailbox-export.h

  Log Message:
  -----------
  dsync: Don't export header hashes if remote mailbox is empty.

This avoids doing a lot of work of reading through all mails' headers and
hashing them, when the hashes aren't actually going to be used for anything.