uts: add a concept of a 'default' set of privileges, separate from 'basic'

*** 983,992 ****
--- 983,993 ----
                  posix_spawnp.3c                         \
                  printstack.3c                           \
                  priv_allocset.3c                        \
                  priv_basicset.3c                        \
                  priv_copyset.3c                         \
+                 priv_defaultset.3c                      \
                  priv_delset.3c                          \
                  priv_emptyset.3c                        \
                  priv_fillset.3c                         \
                  priv_freeset.3c                         \
                  priv_getbyname.3c                       \
*** 1950,1959 ****
--- 1951,1961 ----
  sprintf.3c                              := LINKSRC = printf.3c
  
  priv_allocset.3c                        := LINKSRC = priv_addset.3c
  priv_basicset.3c                        := LINKSRC = priv_addset.3c
  priv_copyset.3c                         := LINKSRC = priv_addset.3c
+ priv_defaultset.3c                      := LINKSRC = priv_addset.3c
  priv_delset.3c                          := LINKSRC = priv_addset.3c
  priv_emptyset.3c                        := LINKSRC = priv_addset.3c
  priv_fillset.3c                         := LINKSRC = priv_addset.3c
  priv_freeset.3c                         := LINKSRC = priv_addset.3c
  priv_intersect.3c                       := LINKSRC = priv_addset.3c