NASHVILLE, Tenn. (AP) — Willie Nelson isn’t saying what is ailing him. But whatever it is, it will keep the 82-year-old country legend off the stage for a bit. He was to perform with Merle Haggard last night and tonight. But both of those shows were canceled because of an unspecified health issue. Those shows will be rescheduled — but one set for tomorrow night in Reading, Pennsylvania won’t be. All Nelson’s Facebook page will say about Nelson is that he’s feeling under the weather. He is scheduled to return to the stage on Sunday.