A man who has been living throughout the frigid winter in an unheated shed in East Hampton without plumbing or other facilities called town authorities last week to report his living conditions.According to East Hampton officials, the man’s landlord has been accepting $400 a month from the Suffolk County Department of Social Services to provide housing for him.Approximately 10 summonses were issued to Luz Lopez Vargas for violations of health, safety, and zoning codes, Betsy Bambrick, the head of East Hampton’s Ordinance Enforcement Department, said Tuesday.