enable iterate_query for dovecot2

Author: florian030

install/dist/lib/debian60.lib.php

@@ -134,6 +134,10 @@ public function configure_dovecot()
 		$content = str_replace('{mysql_server_host}', $conf['mysql']['host'], $content);
 		$content = str_replace('{mysql_server_port}', $conf['mysql']['port'], $content);
 		$content = str_replace('{server_id}', $conf['server_id'], $content);
+		# enable iterate_query for dovecot2
+		if(version_compare($dovecot_version,2, '>=')) {
+			$content = str_replace('# iterate_query', 'iterate_query', $content);
+		}
 		wf($config_dir.'/'.$configfile, $content);
 
 		chmod($config_dir.'/'.$configfile, 0600);