LEIPZIG, Germany, Jan 17 : Leaders Bayern Munich powered back from a goal down, scoring three goals in six minutes, to crush hosts RB Leipzig 5-1 in the Bundesliga on Saturday and maintain their 11-point advantage at the top. The visitors, for whom Jamal Musiala made a brief substitute appearance coupled with an assist in their last goal after breaking his leg and ankle last July, scored all five goals in the second half to maintain their unbeaten run in the league this season and moved up to