Dennis Harvey Film CriticViewers before them had first-generation “Saturday Night Live” and “SCTV.” But five Canadian lads turned out to be “kind of the only comedy group that reflected Gen X,” as fan Fred Armisen puts it in “The Kids in the Hall: Comedy Punks.” Reg Harkema’s documentary is a breezy, worthy overview of a collective career now approaching its 40th anniversary.While best enjoyed by the already converted, it provides enough showbiz insight and interpersonal drama to entertain newbies. It will provide both camps with an appetizer for the Kids’ limited-run reboot of their original sketch series, which new episodes (featuring an array of name guest stars) launch May 13 on Amazon Prime, followed by this doc a week later (on May 20).