The lead singer of Irish rock band U2 has apologised after offering the band’s new album for free to iTunes customers worldwide – following a backlash, with people complaining they never asked for it. Bono said he was sorry in a video, which featured the band answering questions from fans on Facebook, after being asked to never release an album on iTunes that automatically downloads to people’s playlists ever again because “it’s really rude”. “Oops,” said Bono. “I’m sorry about that. “I…