uts: Allow for address space randomisation.
Randomise the base addresses of shared objects, non-fixed mappings, the
stack and the heap.  Introduce a service, svc:/system/process-security,
and a tool psecflags(1) to control and observe it

*** 102,111 ****
--- 102,112 ----
          { 304,  1,      0,      0 },            /* pr_dmodel */
          { 308,  4,      0,      1 },            /* pr_taskid */
          { 312,  4,      0,      1 },            /* pr_projid */
          { 316,  4,      0,      1 },            /* pr_nzomb */
          { 320,  4,      0,      1 },            /* pr_zoneid */
+         { 324,  8,      0,      0 },            /* pr_secflags */
          { 384,  1296,   0,      0 },            /* pr_lwp */
  };
  
  
  static const sl_prstatus_layout_t prstatus_layout = {
*** 375,384 ****
--- 376,392 ----
          { 60,   4,      0,      0 },            /* pr_fdflags */
          { 64,   1,      1024,   0 },            /* pr_path[] */
  };
  
  
+ static const sl_psecflags_layout_t psecflags_layout = {
+         { 0,    8,      0,      0 },            /* sizeof (psecflags_t) */
+         { 0,    4,      0,      0 },            /* psf_effective */
+         { 4,    4,      0,      0 },            /* psf_inherit */
+ };
+ 
+ 
  
  
  static const sl_arch_layout_t layout_amd64 = {
          &auxv_layout,
          &fltset_layout,
*** 398,407 ****
--- 406,416 ----
          &stack_layout,
          &sysset_layout,
          &timestruc_layout,
          &utsname_layout,
          &prfdinfo_layout,
+         &psecflags_layout,
  };
  
  
  const sl_arch_layout_t *
  struct_layout_amd64(void)