Walking past Cafe Buon Gusto this afternoon, I saw this sign in a window: “To all our customers we are moving to a new location 132 Montague starting Sept. 3.” Of course I had to find 132 Montague. It wasn’t hard; it’s on the same block, between Clinton and Henry, on the opposite (north) side. Yes, it’s the site occupied by Dariush, offering “Persian Cuisine” for what seems like just a few months. The sign in the window says “We are temporary sic closed!! We will reopen on September 3rd.” If the sign at Cafe Buon Gusto is to be believed, the place will reopen September 3, but as Cafe Buon Gusto, not Dariush.The downstairs space at 132 Montague has not …