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

*** 323,332 ****
--- 323,338 ----
  typedef union {
          Conv_inv_buf_t                  inv_buf;
          char                            buf[CONV_CNOTE_PROC_FLAG_BUFSIZE];
  } Conv_cnote_proc_flag_buf_t;
  
+ /* conv_psecflags() */
+ #define CONV_PSECFLAGS_BUFSIZE          31
+ typedef union {
+         Conv_inv_buf_t                  inv_buf;
+         char                            buf[CONV_PSECFLAGS_BUFSIZE];
+ } Conv_secflags_buf_t;
  
  /* conv_cnote_sigset() */
  #define CONV_CNOTE_SIGSET_BUFSIZE       639
  typedef union {
          Conv_inv_buf_t                  inv_buf;
*** 820,829 ****
--- 826,837 ----
                              Conv_inv_buf_t *);
  extern  const char      *conv_cnote_pr_why(short, Conv_fmt_flags_t,
                              Conv_inv_buf_t *);
  extern  const char      *conv_cnote_priv(int, Conv_fmt_flags_t,
                              Conv_inv_buf_t *);
+ extern  const char      *conv_psecflags(int, Conv_fmt_flags_t,
+                             Conv_secflags_buf_t *);
  extern  const char      *conv_cnote_psetid(int, Conv_fmt_flags_t,
                              Conv_inv_buf_t *);
  extern  const char      *conv_cnote_sa_flags(int, Conv_fmt_flags_t,
                              Conv_cnote_sa_flags_buf_t *);
  extern  const char      *conv_cnote_signal(Word, Conv_fmt_flags_t,