multi name templates

[tronx2100]

to add multiname templates we can easy do it in pdf_rfltr_default.modules.php starting on line 148

            // add this
            $title = "";  
            $rowid = $object->array_options['options_rfltr_model_id'];
            if ($rowid > 0) {
                $sql = "SELECT title FROM " . MAIN_DB_PREFIX . "referenceletters WHERE rowid = " . $this->db->escape($rowid) . ";";
                $this->db->begin();
                dol_syslog(get_class($this) . "::" . __METHOD__, LOG_DEBUG);
                $resql = $this->db->query($sql);
                if ($resql) {
                    if ($this->db->num_rows($resql) > 0) {
                        $obj = $this->db->fetch_object($resql);
                        $title = '_'.$obj->title;
                    }
                }
            }
            $file_dest = $dir_dest . '/' . $objectref .$title. '.pdf';   // change this