A lawsuit filed recently in the Southern District of Alabama could have national effects on the way private and public high school sports teams compete against each other in the future.A few weeks ago, St. Paul’s Episcopal School in Mobile, Ala., filed suit seeking an injunction to stop a new rule that forces it to play in a larger conference. St. Paul’s Episcopal School v. Alabama High School Athletic Association, et al., No. CV-18-241 (S.D. Ala. Filed May 24, 2018).The Alabama High School Athletic Association …