TranslateInfStringEx.

some code around.

modifications.

codepages.

Maintain a local cache of the debug registers to avoid server calls
where possible.

- created infrastructure in ntdll to support IOCTL for serial devices
- implemented IOCTLs in ntdll for serial break support
- implemented the kernel32 equivalent on top of those IOCTLs

Check for NULL pointer.

Only use the Folder class handler if we're actually executing a
folder.

return value, not of DWL_MSGRESULT.