FORT LIBERTY, N.C. — Nearly a year into leading Army Futures Command, Gen. James Rainey says he’s no longer focused on modernizing the service; he wants to transform it. The four-star command, based in Austin, Texas, opened five years ago to help the service modernize at an ambitious pace. It was originally meant to develop requirements and to work with the acquisition branch to produce nearly three dozen new weapons systems. Now, Rainey said, he’s thinking beyond the equipment that troops will