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

*** 2938,2947 ****
--- 2938,2948 ----
          __nthreads;
          __openattrdirat;
          option_to_attr;
          __priv_bracket;
          __priv_relinquish;
+         psecflags;
          pset_assign_forced;
          pset_bind_lwp;
          _psignal;
          _pthread_setcleanupinit;
          __putwchar_xpg5;