When the Foo Fighters do it, they do it big and the band is back in the biggest, loudest way with Concrete and Gold, their ninth LP. The album is of course supported by the first of many touring stints and one special event to kick it all off: Cal Jam 17.The event is an all-out rock and roll summit, bringing together the Foos and Queens of the Stone Age, Cage the Elephant, Liam Gallagher, The…