diff -u includes/authorize.inc includes/authorize.inc
--- includes/authorize.inc	29 Oct 2009 08:04:37 -0000
+++ includes/authorize.inc
@@ -29,7 +29,7 @@
   uasort($available_backends, 'drupal_sort_weight');
 
   if (!$is_https) {
-    drupal_set_message(t('WARNING: you are not using an encrypted connection via https, so your password will be sent in plain text over the network.'), 'error');
+    drupal_set_message(t('WARNING: You are not using an encrypted connection, so your password will be sent in plain text. <a href="@https-link"/>Learn more about this</a>.', array ('@https-link' => 'http://drupal.org/https-information')), 'error');
   }
 
   // Decide on a default backend.