The DOCNYC festival is back, and this year there are more documentaries about and by photographers.  I’ve seen the first ones, VII Uncomissioned and Men At Lunch, one a selection of shorts by members of the photo agency, and the other dissecting the iconic photo of men sitting on a steel beam high above Manhattan in 1932. VII Uncomissioned begins with “On The Line,” a piece by Ashley Gilbertson about a suicide hotline for veterans.  Using still images and audio,…