proxy auth: be explicit it is a 302 (default)

src/proxyauth.js

@@ -155,14 +155,14 @@ function authorize(req, res, next) {
                 secure: true
             });
 
-            res.redirect('/');
+            res.redirect(302, '/');
         });
     });
 }
 
 function logoutPage(req, res) {
     res.clearCookie('authToken');
-    res.redirect('/'); // do not redirect to '/login' as it may not be protected
+    res.redirect(302, '/'); // do not redirect to '/login' as it may not be protected
 }
 
 function logout(req, res, next) {