Update: Use F_okay instead of F_none as the first status code.

Update: Use F_okay instead of F_none as the first status code.

This change is in two parts.
This part is just changing the status codes.
The next part will be changing all code using the status code F_none as the standard return to instead use F_okay.

I believe that F_okay makes more semantic sense than F_none when providing a standard code.
The original idea of F_none is that there are no errors.
I think "okay" is even more accurate.

Furthermore, the F_okay better matches the return code of the HTTP standard "HTTP 200 Okay".