winedos / Migrate current drive routines and add date conversions

[Gy örgy 'Nog' Jeney]

> Well, I thought SetCurrentDirectory didn't work like that,
> but if it does then there is no reason why that implementation
> couldn't be used. GetCurrentDrive ought to verify that second
> character is indeed ':' (preparing for UNC names) but that should
> work, too. Using wide character versions would be preferred, though.
>

Ok, I've had time to check this on win98 and SetCurrentDirectory doesn't
work like this.  This is doable as its done in wcmd:
G:\wine\programs\wcmd>c:
C:\>cd windows
C:\windows>g:
G:\wine\programs\wcmd>c:
C:\windows>

nog.