By Steven UhlesStaff WriterTuesday, March 30, 2010 For John Rzeznik, singer and guitarist for the Buffalo, N.Y.-bred Goo Goo Dolls, rock 'n' roll has always been more about evolution than revolution.The band, which started in the mid-'80s wanting, in Rzeznik's words, to "... be the Replacements and Husker Du" has, over nearly 25 years, evolved from scruffy punks to polished product to working rock band. It's that last, and most current, incarnation that Rzeznik likes most."It's really liberating," he said in a telephone interview promoting the band's headlining appearance Tuesday at the Rock F