

          keylset listvar key value [key2 value2 ...]
               Set the value associated with key, in the keyed list
               contained in the variable listvar, to value.  If
               listvar does not exists, it is created.  If key is not
               currently in the list, it will be added.  If it already
               exists, value replaces the existing value.  Multiple
               keywords and values may be specified, if desired.
