“To attempt a faithful description of this play is a daunting task.”Thus began the first sentence of the program guide notes for Steppenwolf Theatre’s current production of Harold Pinter’s “No Man’s Land.” Directed by Les Waters, the show is playing through Aug. 20 on Steppenwolf’s downstairs main stage.The program notes, written by the show’s artistic directors Glenn Davis and Audrey Francis, continue with: “Is the play a melodrama, the story of a stranger who …