By Brian Ellsworth (Reuters) -The United Nations on Thursday called for the creation of a “humanitarian corridor” in Haiti that would allow the distribution of fuel amid dire shortages created by a gang blockade of the country’s principal fuel terminal. Gangs last month blocked the entrance to the Varreux fuel terminal to protest Prime Minister Ariel Henry’s announcement of a cut in fuel subsidies, paralyzing Haiti’s economy as supplies of gasoline and diesel dried up. Haitians also face a shortage of drinking water amid an unexpected outbreak of cholera, the spread of which is controlled thro…