BEFORE PSG got rich and threatened to join the uber-clubs of Europe, French football had only spasmodically made an impact on the big stages. True, Stade de Reims reached a couple of European Cup finals in the nascent years of the European Cup, and Marseille won the competition in the 1990s, but the team that captured the hearts of European football watchers was Saint-Etienne of the mid-1970s. Most people will struggle to put a pin in the map and tell you where Saint-Etienne is located. It’s in the Massif Central, and is a name synonymous with the French bicycle industry. It has often been a Tour de France stage. It was once a big coal mining area. And if justice had been done, this…