A number of artists have announced some sideshows around this year’s Louder Than Life and LDB festivals. Here’s the dates and lineups: 09/27 Louisville, KY – Portal (feat. Kublai Khan TX, Sanguisugabogg, and Surfacer) 09/27 Louisville, KY – Mag Bar (feat. High Vis, The Chisel, and Walk Alone) 09/28 Louisville, KY – Portal (feat. Pain…