Support /64 style 'brands'.
See test_brand_extra in /65 and equivalent functions in /64. Brand application from rings is handled differently in /64 to Vanilla. The test_brand_extra function is also required for timed brands given by potions.
See test_brand_extra in /65 and equivalent functions in /64. Brand application from rings is handled differently in /64 to Vanilla. The test_brand_extra function is also required for timed brands given by potions.