After decades of war, invasions and instability, Iraq hosts the eight-nation Gulf Cup starting on Friday for the first time since 1979. For the country’s football officials and government, success off the field will be a bigger prize than success on it. The national teams, all from West Asia and split into two groups of four, will converge on the southern port city of Basra. If the 25th edition of the tournament progresses smoothly then it could encourage FIFA to allow World Cup qualifiers to return to Baghdad, which has not hosted a competitive international since before the 2003 US-led invas…