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.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot