increased default dkim-strength from 1024 bits to 2048

Author: Florian Schaal

interface/web/admin/form/server_config.tform.php

@@ -320,8 +320,8 @@
 		'dkim_strength' => array(
 			'datatype' => 'INTEGER',
 			'formtype' => 'SELECT',
-			'default' => '1024',
-			'value' => array('1024' => 'normal (1024)', '2048' => 'strong (2048)', '4096' => 'very strong (4096)')
+			'default' => '2048',
+			'value' => array('1024' => 'week (1024)', '2048' => 'normal (2048)', '4096' => 'strong (4096)')
 		),
         'relayhost_password' => array(
             'datatype' => 'VARCHAR',