Convert rule_list.rb to YARD.
Convert rule_list.rb to YARD.

openlogic/publicsuffix-ruby,itcentralstation/publicsuffix-ruby,weppos/publicsuffix-ruby,stas-tanko/publicsuffix-ruby,jedisct1/publicsuffix-ruby,emq/publicsuffix-ruby,CloudCannon/publicsuffix-ruby