AVDIYIVKA, Ukraine/KIEV (Reuters) - For Ukrainian pensioner Olga Shazhkova, channel-surfing in the front line town of Avdiyivka is a monotonous business. Ukrainian pensioner Olha Shazhkova shows one of the Russian channels available on her television at home in the front line town of Avdeyevka, Ukraine, August 10, 2016. REUTERS/Gleb Garanich With the face of Vladimir Putin looming large on her TV