More than 20 years into their career, the Goo Goo Dolls have no problem circling back to the smaller markets that supported them in the late ’80s before they ever had a hit.“That’s where the real people are. That’s where the real fans are,’’ said frontman Johnny Rzeznik. “You’ve got to get to everybody.’’Does that mean the trio so often heralded as the hard-workin’ band out of blue-collar Buffalo, N.Y., is just as true to its Teflon work ethic now as it was back then?“You mean have we become fat, lazy rock stars?’’ Rzeznik said, laughing. “No, we haven’t really. We’re probably not as skinny as