In the past two weeks, Valery Gergiev conducted the opera “Boris Godunov” at the Met in New York. Then he took his musicians, the Mariinsky Orchestra, to Detroit, Chicago and Chapel Hill. This week he’s doing five concerts at Carnegie Hall. Oh, and in the midst of all that, he performed at the Kennedy Center. Dick Gordon met the maestro in his dressing room, backstage at The University of North Carolina’s Memorial Hall, for an intimate conversation. Also, another listener story about when politics became personal.