move x509 to top level, add more docs
diff --git a/docs/index.rst b/docs/index.rst
index 083533c..918b43a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -67,6 +67,7 @@
     exceptions
     faq
     glossary
+    x509
 
 The hazardous materials layer
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~