+void Command::add_arg(const unsigned& arg) {
+#ifdef DEBUG
+ cerr << __FILE__ << "(" << __LINE__ << ")"
+ << ": add_arg(arg = " << arg << ") = "
+ << String().from(arg) << endl;
+#endif // DEBUG
+ args.push_back(String().from(arg));
+ build();
+}
+
+istream& operator>>(istream& is, Command& command) throw(HTTPError, sockerr) {