After a season of “reimaginings” of classic works that completely overhaul original concepts, it is somewhat refreshing to have a more traditional revival of Ghosts, Henrik Ibsen’s classic that is ending its run next weekend at Lincoln Center’s Mitzi Newhouse Theater. The 1882 play tackles infidelity, sexually transmitted diseases, incest and euthanasia across different levels of Norwegian society, following a mother, her son and other people in their orbit as devastating family secrets come to light. The salacious subject matter was shocking for its time, and sparked a vitriolic pushback from the public — including royalty — before it was eventually