By Denny Dyroff, Entertainment Editor, The Times Kathy Mattea Sometimes, dealing with your body as you grow older is like dealing with an old car. Everything works, but some of the parts just aren’t working as well as they used to work. Just ask Kathy Mattea. Mattea, a country music star who is headlining a show – “Kathy Mattea: The Acoustic Living Room Songs & Stories” — on October...