Hawaiian BBQ Pulled Pork Sandwich with Grilled Pineapple Relish

Name: Hawaiian BBQ Pulled Pork Sandwich with Grilled Pineapple Relish
Ingredients: 1/4 cup light brown sugar; 1 tablespoon ground coriander; 1 tablespoon garlic powder; 1 tablespoon onion powder; 1 tablespoon kosher salt; 1 teaspoon freshly ground black pepper; 2 teaspoons ground cinnamon; 1 teaspoon ground cumin; 1 boneless pork butt or shoulder, fat cap scored (about 5 pounds); Sweet Chile Sauce, warmed, recipe follows; Unsalted butter, softened, to toast rolls; 4 soft potato rolls or sweet Hawaiian bread rolls; Grilled Pineapple Relish, recipe follows; Shredded red cabbage, to garnish; 2 cups rice vinegar; 1 cup brown sugar; 1 tablespoon crushed red pepper; 1 teaspoon kosher salt; 4 cloves garlic, smashed; Oil, for grilling; 1 fresh pineapple, skinned, cored and cut into 1-inch slices; 2 tablespoons chopped fresh cilantro; 1 tablespoon peeled and grated fresh ginger; 1 lime, juiced; 1 jalapeno, seeded and diced; 1/2 red onion, diced; Kosher salt and freshly ground black pepper