Mix the glaze ingredients together and let sit while you're getting the charcoal ready. Place the ham on a rack in a deep 14" Dutch oven along with juices from the fruit and pineapple and the water. Brush the ham with the glaze and any other seasoning you wish to add. Place pineapple rings on the ham with a maraschino cherry in the center of each ring, if desired. Use toothpicks to secure pineapple rings and cherries to ham, if needed. Set the Dutch Oven in a firepan with 8-10 briquets underneath and 12-14 around the outside of the lid and cook for an hour. Brush ham with the remaining glaze 2-3 times during cooking.