Donna Summer performs at the taping of the VH1 special, “VH1 Divas 2000: A Tribute to Diana Ross” in New York, April 9, 2000. A new box set strives over seven CDs or 10 LPs to capture the musical breadth Summer spent much of her career trying to prove. (Ozier Muhammad/The New York Times) By STEVE KNOPPER The story of how Donna Summer’s heavy-breathing “Love to Love You Baby” expanded to 16 minutes, 48 seconds, is one of the classic yarns of the disco era. Neil Bogart loved the 1975 single so…
