nally directed" theo- ry. U.S.CA ConstAmend. 5; 18 U.S.C.A. § 2334(a); Fed.Rules Civ.Proc.Rule 4(k)(2), 28 U.S.CA 45. Constitutional Law e=105(5) Federal Courts '76.25, 86 Modified due process standard appro- priate for mass torts would not be applied to question whether district court had per- sonal jurisdic