DUBLIN (Reuters) - The annual crowning of a goat as king of Ireland at one of the country's oldest fairs is in doubt after organizers said the heir to the throne may be stopped from traveling to the festival.Traditionally a male goat is caught in the mountains of Kerry in southern Ireland and paraded through the town of Killorglin where he reigns for the three days of Puck Fair, a centuries-old festival of drinking, music and dancing.Locals may have to desperately trek the nearby hills after thi