Update reverse proxy doc with new /sso endpoint.

docs/reverse.rst

@@ -47,7 +47,7 @@ Then on your own frontend, point to these local ports. In practice, you only nee
     }
   }
 
-Because the admin interface is served as ``/admin`` and the Webmail as ``/webmail`` you may also want to use a single virtual host and serve other applications (still Nginx):
+Because the admin interface is served as ``/admin``, the Webmail as ``/webmail``, the single sign on page as ``/sso`` and webdav as ``/webdav``, you may also want to use a single virtual host and serve other applications (still Nginx):
 
 .. code-block:: nginx
 
@@ -63,6 +63,16 @@ Because the admin interface is served as ``/admin`` and the Webmail as ``/webmai
       proxy_set_header Host $http_host;
     }
 
+    location /sso {
+      proxy_pass https://localhost:8443/sso;
+      proxy_set_header Host $http_host;
+    }
+
+    location /webdav {
+      proxy_pass https://localhost:8443/webdav;
+      proxy_set_header Host $http_host;
+    }    
+
     location /main_app {
       proxy_pass https://some-host;
     }