Punk-rock reunions blow, as a general principle. But here’s how we know a new day is upon us: Amebix, the greatest of all survivalist-crust-punk outfits — my love for Discharge makes me hesitant to write that, but Amebix allegedly had a dude in the band who forged swords for a living after their breakup — is touring the U.S. early next year for the first time ever. Check out the Philadelphia show — Behind Enemy Lines is on the bill. So much for showering.