“SALAD DAYS: The Birth of Hardcore Punk in the Nation’s Capital” is a documentary that examines the fertile Washington, DC punk scene of the 1980s. This was a particularly important time in the evolution of punk and independent music, with DC based bands like Minor Threat, Bad Brains, Black Market Baby, the Faith, the Slickee Boys, Void, Government Issue, Marginal Man, Dag Nas…