Remove dead code, use proper send_ordered_response

And prepare to try to close a connection gracefully

src/connection.cpp

@@ -206,6 +206,10 @@ uint32_t Connection::write_bytes() {
               part.size()};
           iov_count++;
         }
+
+        if (message.close_after_send) {
+          break;
+        }
       }
 
       if (iov_count == 0)