Time for a rabbit’s foot, four-leaf clover, horseshoe, or whatever lucky charm horse racing fans can dig up. For savvy bettors, serious handicapping is in full swing as horseplayers around the world gear up for another stellar summer season at Saratoga Race Course. Let the races begin! The 46-day racing season opens Friday, with the traditional feature the $200,000 Schuylerville Stakes for 2-year-old fillies going 6 furlongs.