add P&S sections pointing to Concepts (#89)

* add P&S sections pointing to Concepts

* Update spec/index.html

Co-authored-by: Andy Seaborne <[email protected]>

* Update spec/index.html

Co-authored-by: Andy Seaborne <[email protected]>

---------

Co-authored-by: Andy Seaborne <[email protected]>

Author: pfps

spec/index.html

@@ -2240,6 +2240,19 @@ <h4>RDF collections</h4>
 
 </section>
 
+<section id="privacy" class="informative appendix">
+  <h2>Privacy Considerations (Informative)</h2>
+  <p>
+    See <a data-cite="RDF12-CONCEPTS#privacy">Privacy Considerations</a> in [[RDF12-CONCEPTS]].
+  </p>
+</section>
+<section id="security" class="informative appendix">
+  <h2>Security Considerations (Informative)</h2>
+  <p>
+    See <a data-cite="RDF12-CONCEPTS#security">Security Considerations</a> in [[RDF12-CONCEPTS]].
+  </p>
+</section>
+
 <section id="Acknowledgments" class="informative appendix" >
   <h2>Acknowledgments</h2>