Black History Month closes out with the musical special ”Black Broadway: A Proud History, A Limitless Future” (PBS, 9 p.m., check local listings). Recorded at Howard University last fall, it features performances including Stephanie Mills, Nova Payton, Corbin Bleu,Tiffany Mann and Peppermint, pictured above, singing from shows like “The Wiz,” “The Color Purple,” “Company,” “Porgy […]