date is too strict about argument ordering

date is now too strict about argument ordering. This was working in 0.2.2 as shipped with Ubuntu but in 0.6.0 it broke again

```
date "+%Y%m%d%H%M%S" --date "@$(date +%s)"
```

errors with `date: extra operand '--date'` - it does work if you reorder the arguments as `date  --date "@$(date +%s)" "+%Y%m%d%H%M%S"`

Found this while trying to build systemd as they use the arguments in this order.
