RULES-OF
========

syntax: (rules-of <ruleset-specifier>
                  [:IDENTIFIER T | NIL | Var]
                  [:KB <kb>])


This function returns a list of the rules, which 
exist in this set of rules. If you do not give any 
details, then you get back the objects, which 
means that the ':IDENTIFIER' will be set to NIL. If 
you set ':IDENTIFIER' to T, then a list of rule
identifiers will be returned.

example: >(rules-of 'holidayoffer :identifier T)
         (HOLIDAYSELECTION)