In Stratford, Ont., Canada’s pre-eminent Shakespearean festival offers a quatercentenary season of Macbeth and two productions which, each in its own manner, push hot buttons: Breath of Kings, Abbey’s two-part adaptation of Shakespeare’s history plays, and As You Like It. In the comedy, Seana McKenna, whose distinguished career has seen her tackle two dozen of the Bard’s major female roles, will play Jaques. But not as an actress in a masculine role, as McKenna did in 2011 with King Richard III. This time, Jaques is a woman.