upstream: disallow empty incoming filename or ones that refer to the

current directory; based on report/patch from Harry Sintonen

OpenBSD-Commit-ID: f27651b30eaee2df49540ab68d030865c04f6de9
scpio(void *_cnt, size_t s)
{
	off_t *cnt = (off_t *)_cnt;

	*cnt += s;
	if (limit_kbps > 0)
		bandwidth_limit(&bwlimit, s);
	return 0;
}

scpio(void *_cnt, size_t s)
{
	off_t *cnt = (off_t *)_cnt;

	*cnt += s;
	if (limit_kbps > 0)
		bandwidth_limit(&bwlimit, s);
	return 0;
}
