C: A101 LIST "" ""
  S: * LIST (\Noselect) "/" ""
  S: A101 OK LIST Completed
  C: A102 LIST #news.comp.mail.misc ""
  S: * LIST (\Noselect) "." #news.
  S: A102 OK LIST Completed
  C: A103 LIST /usr/staff/jones ""
  S: * LIST (\Noselect) "/" /
  S: A103 OK LIST Completed
  C: A202 LIST ~/Mail/ %
  S: * LIST (\Noselect) "/" ~/Mail/foo
  S: * LIST () "/" ~/Mail/meetings
  S: A202 OK LIST completed