“It's almost fitting that the amount of Fleetwood Mac covers released this year has been as excessive as the band itself ever was. Still, after the limp Randall Poster-curated covers album from earlier this year, you'd be hard pressed to find anyone who actually wants to indulge that indulgence. And yet, British rock monthly Mojo's current cover-mount CD features artists like Liars, Yeasayer, and t”