PHILADELPHIA — A federal judge has approved a plan to resolve thousands of NFL concussion lawsuits that could cost the league $1 billion over 65 years.The NFL expects 6,000 of nearly 20,000 retired players to suffer from Alzheimer's disease or moderate dementia someday. The settlement approved Wednesday by a federal judge in Philadelphia would pay them about $190,000 on average.The awards could reach $1 million to $5 million for those diagnosed in their 30s and 40s with Parkinson's disease or Lou Gehrig's …