Singer Johnny Rzeznik is sober and “So Alive.”Some 30 years ago, members of the Goo Goo Dolls were driving around in a van, playing for, oh … roughly 10 people. Four albums in, they had failed to snag a hit song. All of that changed in 1995 with the release of their fifth album, “A Boy Named Goo” when the band’s third single, “Name,” took off.“Then, boom! All of a sudden, you have this enormous hit song … Everything went crazy,” frontman John Rzeznik told The Huffington Post.The track topped the rock charts and reached No. 5 on the Billboard 100, eventually driving more people to the then “und