There is a new place for Stamford residents to go when they are sick.The CVS drugstore on Newfield Avenue has added a walk-in clinic. A nurse is on hand to examine and possibly treat a patient?s ailment at the ?minute clinic.? This walk-in clinic specializes in sicknesses that can be diagnosed and treated within about 15 minutes.With busy schedules, many residents say the clinic is a good idea and will save them time. Others, however, say when they are sick they would rather see their own doctor.