smf: switch to a tri-state for process-security properties true=on,false=off,nil=default

@@ -272,11 +272,11 @@
         /* Stable */
         uid_t           uid, euid;
         gid_t           gid, egid;
         int             ngroups;                /* -1 means use initgroups(). */
         gid_t           groups[NGROUPS_MAX];
-        psecflags_t     def_secflags;
+        scf_secflags_t  def_secflags;
         secflagdelta_t  secflag_delta;
         priv_set_t      *lpriv_set, *priv_set;
         char            *corefile_pattern;      /* Optional. */
         char            *project;               /* NULL for no change */
         char            *resource_pool;         /* NULL for project default */