Boston is a long way from Nashville, but don’t tell that to country superstar Kenny Chesney. Chesney’s show at Foxboro’s Gillette Stadium on Sunday made history: It was the top grossing single-day country music concert ever. “I don’t know about history,” Chesney said in a press release yesterday. “I just know about smiling faces and people having a good time, and there sure were a lot of ’em at Gillette Stadium.” The singer/songwriter from Luttrell, Tenn., became one of only 16 acts to gross more than $4 million at a single concert, joining a list that includes the Rolling Stones,...