fixup! Deprecate b.Bridges.is_valid_ip() in favour of b.parse.addr.isValidIP().
Call super().__init__() for bridgedb.Dist.*BasedDistributor classes.
Change b.Bridges.is_valid_ip to b.p.addr.isValidIP in bridgedb.HTTPServer.
Change b.Bridges.is_valid_ip to b.p.addr.isValidIP in bridgedb.Main.