Log Message:
Changes 2.0.12:
* doveadm: Added "move" command for moving mails between mailboxes.
* virtual: Added support for "+mailbox" entries that clear \Recent
  flag from messages (default is to preserve them).
* dbox: Fixes to handling external attachments
* dsync: More fixes to avoid hanging with remote syncs
* dsync: Many other syncing/correctness fixes
* doveconf: v2.0.10 and v2.0.11 didn't output plugin {} section right