lerror("set_nopush");
if (debug) lerror("set_nopush");
static int begin_response(struct connection *cn){	if (cn->rfd == -1) {		cn->left = 0;		return 0;	}	cn->left = cn->r->content_length;#if defined LINUX_SENDFILE || defined FREEBSD_SENDFILE	if (set_nopush(cn->fd, 1) == -1) {		lerror("set_nopush");		return -1;	}	return 0;#else	if (cn->file_offset)		if (lseek(cn->rfd, cn->file_offset, SEEK_SET) == -1) {			lerror("lseek");			return -1;		}	return fill_connection(cn);#endif}