The Boston Bruins are 73 days away from puck drop at TD Garden. Training camp opens in less than two months, and from there, the Bruins will have a full 84-game schedule to navigate. Yesterday, BHN took a shot at opening night lines, trimming the depth chart down to four lines, three pairs, and the extra skaters. Oh, and the goalies, but that is one we all knew beforehand. The Bruins are not the only team in the Daily with projected lines, eit…