Changes to 'dev/fix_annotation'

[Sandro Knauß]

New branch 'dev/fix_annotation' available with the following commits:
commit 1b6f7def7135ad44018dd54a824435594562f308
Author: Sandro Knauß <mail at sandroknauss.de>
Date:   Mon Nov 10 15:27:51 2014 +0100

    Fix GETANNOTATION for Other Users
    
    If GETANNOTATION/METADATA is requestes for many folders, the server can
    get stuck and the connection will timeout. To fix this, we ask only for
    subfolders, when requesting for folders in "Other Users".
    
    For searching we need to request all metadata for "Shared Folders".
    "Shared Folders" is not a valid mailbox, so we can't request ACLs for
    it.
    
    KOLAB: 3875