As I sat in the darkened Broadway Theater at the Pride Arts Center, 4130 N. Broadway, practically in the shadow of Chicago’s Boystown, watching a bare-bones performance of “Holding the Man,” I couldn’t help but think about and compare it with many of the earlier theatrical productions concerning gay and lesbian lives in this country.By Tommy Murphy, the play is adapted from the award-winning memoir of the late Timothy Conigrave about his bittersweet relationship with his partner in Australia during …