Jane’s Addiction has reunited? Or something? It’s hard to keep up with the iterations of the ’90s alt-funk band and the solo exploits of Perry Farrell and Dave Navarro. The bottom line is that they’re at the Uptown Friday, and Navarro will be strutting around the stage wearing ass-hugging pants and no shirt. They’re touring on their most recent release, 2011’s The Great Escape Artist.