add: extern int remote_version;  if (remote_version >= 23) io_start_multiplex_out(f_out);
context: void start_server(int f_in, int f_out, int argc, char *argv[]){	extern int cvs_exclude;	extern int am_sender;	setup_protocol(f_out, f_in);	if (am_sender) {		recv_exclude_list(f_in);		if (cvs_exclude)			add_cvs_excludes();		do_server_sender(f_in, f_out, argc, argv);	} else {		do_server_recv(f_in, f_out, argc, argv);	}	exit_cleanup(0);}