Mack Hansen, a former electrician with just nine appearances for Connacht, who’s only in Galway because he drank in the same Canberra bar as Andy Friend’s son, is about to make his debut, in the opening game of this year’s Six Nations. Let that settle in for a moment. There is something life-affirming about seeing a player with such a relaxed demeanour on the pitch and a career path shaped by happenstance, heritage and pub talk, making it to the top of the rugby tree. Hansen has a swagger and a bag of tricks, he’s top of the metres made…