(Reuters) -Dufry said on Monday it will acquire Italian airport and motorway caterer Autogrill, expanding the Swiss duty-free retailer’s growth opportunities in international markets. Italy’s Benetton family – the largest investor in Autogrill through its Edizione holding company – will transfer its entire 50.3% stake to Dufry at an exchange ratio of 0.158 new Dufry shares for each Autogrill share, according to Dufry. Edizione will become Dufry’s largest shareholder with a stake of between about 25% and 20%. After the transfer, Dufry will launch a tender offer for the remaining Autogrill share…