6583 remove whole-process swapping

*** 282,292 ****
           * initialize t0
           */
          t0.t_stk = (caddr_t)rp - MINFRAME;
          t0.t_stkbase = t0stack;
          t0.t_pri = maxclsyspri - 3;
!         t0.t_schedflag = TS_LOAD | TS_DONT_SWAP;
          t0.t_procp = &p0;
          t0.t_plockp = &p0lock.pl_lock;
          t0.t_lwp = &lwp0;
          t0.t_forw = &t0;
          t0.t_back = &t0;
--- 282,292 ----
           * initialize t0
           */
          t0.t_stk = (caddr_t)rp - MINFRAME;
          t0.t_stkbase = t0stack;
          t0.t_pri = maxclsyspri - 3;
!         t0.t_schedflag = 0;
          t0.t_procp = &p0;
          t0.t_plockp = &p0lock.pl_lock;
          t0.t_lwp = &lwp0;
          t0.t_forw = &t0;
          t0.t_back = &t0;