SOFIA, Aug 26 (Reuters) - Former Prime Minister Boiko Borisov became the oldest footballer to appear for a Bulgarian professional club on Sunday when the 54-year-old played in his team Vitosha Bistritsa's goalless draw against Rakovski in a domestic second division match. Vitosha, playing in a professional league for the first time, are eighth in the standings on four points from three games. ... More...