Linked from autoescape to markup

--HG--
branch : trunk
diff --git a/jinja2/environment.py b/jinja2/environment.py
index b044178..00e3646 100644
--- a/jinja2/environment.py
+++ b/jinja2/environment.py
@@ -135,6 +135,8 @@
 
         `autoescape`
             If set to true the XML/HTML autoescaping feature is enabled.
+            For more details about auto escaping see
+            :class:`~jinja2.utils.Markup`.
 
         `loader`
             The template loader for this environment.