When it comes to the future of the Kensington Expressway (formerly Humboldt Parkway), everyone has an opinion. For those that have high hopes about the expressway one day being restored to its historic glory as an Olmsted boulevard, I suggest that you attend one of the encore screenings at North Park Theatre. Humboldt Parkway, the documentary that took home the Audience Award at last month’s Buffalo International Film Festival (BIFF), is returni…