AC40899 - Dombrowski v. New Haven (Denial of motion to open parties' stipulation that settled claims; reviewability of claims not presented to commissioner; settlement contingent upon approval of the city; claim that opening the stipulation not warranted due to failure of offering any evidence of “fraud, misrepresentation, accident, or mistake”; "On appeal, the plaintiff raises a number of claims that, in essence, challenge the propriety of the board’s decision affirming the commissioner’s denial of his motion to open. We affirm the decision of the board.")