Cleaned up LIST ref "" handling. Removed some UW-IMAPisms, they shouldn't be needed.
Cleaned up LIST ref "" handling. Removed some UW-IMAPisms, they shouldn't be
needed.

--HG--
branch : HEAD

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