A thrift with heavy involvement in the subprime mortgage market got new life last week, with a bailout plan that helped stave off regulatory action. What’s not clear is whether Superior Bank’s problems will affect the future of its Alliance Funding wholesale unit. The Office of Thrift Supervision last week approved a $350 million capital restoration plan for the Oakbrook, Illinois-based thrift. The money reportedly came from two families – the Chicago-based Pritzkers chipped in