Geddy Lee — or rather, as his touching new memoir, “My Effin’ Life,” makes plain, the man born with so many family names, nicknames and colloquial derivations of names, his own mother was uncertain of the name on his birth certificate — is a complicated guy. You would expect as much from the bassist of Rush. They were a famously complicated band, playing complicated prog-rock epics. Their fans, who packed Auditorium Theatre last Sunday night to hear Lee talk about his life, are complicated themselves. Famously so. I am a fan myself, but like some Rush fans, I concealed my...