Don't convert real separators to virtual separators. The mailbox listing code already did it for us.
Don't convert real separators to virtual separators. The mailbox listing
code already did it for us.

--HG--
branch : HEAD

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot