phobos/tango on win32: please drop ANSI "support"

[Lionello Lunesu]

Both Phobos and Tango pretend utf8 is valid for calling ANSI methods 
from the Windows' API. Obviously, it's not. The correct way is to 
convert the utf8 string to the code-page expected by the call, or 
convert them to unicode.

I'd like to suggest the latter. Let's drop the ANSI support for Win32 
altogether. Unicode is supported since Windows 95 OSR-2 (if I'm not 
mistaken) and converting utf8 to ANSI is more expensive than converting 
it utf8 to utf16 (which is what Windows 2000 and up convert to 
internally anyway). No more "bool UseWFuncs". And converting utf8 to 
utf16 using MultiByteToWideChar would also take care of the 0-terminator.

There, I've said it.

L.