By DCist contributor Dave Weigel What’s the opposite of insult comedy? We know how to react when a has-been (sorry, “classic entertainer”) like Don Rickles points out fat people and tries to get them crying, or when ironic comics like Zach Galifiankis or Neil Hamburger blow up in righteous anger at their audiences. But what do you call it when a comic wants to be your pal? The audience at Stella’s show at the Sixth…