“On ‘The Loss’, the penultimate track from Korn’s new album, ‘The Nothing’, frontman Jonathan Davis sings, “happiness is a club I’ll never be in.” It’s a stifling, hopeless image, one with little light at the end of the tunnel, and a lyric that sums up not only this album, but the band’s 26-year career in general. All metal bands deal with bleak topics – drugs, abandonment and suicide – but few of ”