       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.
