more doc about signon

Documentation.html

@@ -479,6 +479,15 @@ GRANT ALL PRIVILEGES ON user_base.* TO 'real_user'@localhost IDENTIFIED BY 'real
         not required.</li>
 </ul>
 
+<h4>'signon' authentication mode</h4>
+
+<ul><li>This mode is a convenient way of using credentials from another
+	application to authenticate to phpMyAdmin.</li>
+    <li>The other application has to store login information into 
+	session data.</li>
+    <li>More details in the <a href="#cfg_Servers_auth_type">auth_type</a>
+	section.</li>
+</ul>
 <h4>'config' authentication mode</h4>
 
 <ul><li>This mode is the less secure one because it requires you to fill the

libraries/export/pdf.php

@@ -299,7 +299,7 @@ class PMA_PDF extends TCPDF
 
             ksort($this->tablewidths);
         }
-
+        echo 'trace<pre>'; print_r($this->tablewidths); echo '</pre>';
         PMA_DBI_free_result($this->results);
 
         // Pass 2