Avoid unneeded/redundant calls to lstrcatW() and lstrlenW().
Tighten the scope of variables.

regedit: The xxx_name_len variables track buffer sizes. That is they count the trailing '\0'. Adjust a couple of places that got this wrong and rename them to xxx_name_size.

That is it does not count the trailing '\0'.
Fix a few places that got this wrong and rename it to line_len.

winemenubuilder: Moved all wineshelllink functionality to winemenubuilder and removed wineshelllink.

mountmgr: Make the device type more specific than what is possible with the standard Win32 drive types.