dovecot - Aug 2014 - Multiple ALT mail_location possible?

http://wiki2.dovecot.org/MailboxFormat/dbox#Alternate_storage
lists
mail_location = mdbox:/var/vmail/%d/%n:ALT=/altstorage/vmail/%d/%n


But can I have multiple ALT= locations? Background: I want to migrate
to a hashing-scheme!

-- 
[*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64
Franziskanerstra?e 15, 81669 M?nchen

Sitz der Gesellschaft: M?nchen, Amtsgericht M?nchen: HRB 199263
Vorstand: Patrick Ben Koetter, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein