using_sftp = !ssh_fallback_cmd;
static void ssh_scp_init(void){    if (scp_ssh_socket == INVALID_SOCKET)	return;    while (!back->sendok()) {	fd_set readfds;	FD_ZERO(&readfds);	FD_SET(scp_ssh_socket, &readfds);	if (select(1, &readfds, NULL, NULL, NULL) < 0)	    return;		       /* doom */	select_result((WPARAM) scp_ssh_socket, (LPARAM) FD_READ);    }}