This text can include %(attribute)s format strings
which are resolved against the list's attributes.  For details, see
Python's
string formatting rules.  Some useful attributes are:
real_name - The `pretty' name of the list; usually
    the list name with capitalization.
    _internal_name - The name by which the list is
    identified in URLs, where case is significant.
    host_name - The fully qualified domain name
    that the list server runs on.
    web_page_url - The base URL for Mailman.  This
    can be appended with,
    e.g. listinfo/%(_internal_name)s to yield the
    listinfo page for the mailing list.
    description - The brief description of the
    mailing list.
    info - The full description of the mailing
    list.