[Bug 44373] cmd's path variables (e.g. %~dp0 / %~dp1) don' t match those of Windows (w.r.t. case and quoting)

https://bugs.winehq.org/show_bug.cgi?id=44373

--- Comment #1 from Ryan Prichard  ---
The case canonicalization differences can also affect %1:

c:\Bin\ShowArg1.Cmd

@echo [%1] -------------------- [%~d1] [%~p1] [%~n1] [%~x1]

Win10.0.16299.125:

C:\Windows>c:\Bin\ShowArg1 SysTem32\NotePad.Exe
    [SysTem32\NotePad.Exe] -------------------- [C:] [\Windows\System32]
[notepad] [.exe]

C:\Windows>c:\Bin\ShowArg1 "SysTem32\NotePad.Exe"
    ["SysTem32\NotePad.Exe"] -------------------- [C:] [\Windows\System32]
[notepad] [.exe]

C:\Windows>c:\Bin\ShowArg1 "SysTem32\NotePad".Exe
    ["SysTem32\NotePad".Exe] -------------------- [C:] [\Windows\System32]
[NotePad"] [.Exe]

C:\Windows>c:\Bin\ShowArg1 Sys"Tem32\NotePad".Exe
    [Sys"Tem32\NotePad".Exe] -------------------- [C:] [\Windows\Sys"Tem32]
[NotePad"] [.Exe]

C:\Windows>c:\Bin\ShowArg1 Sys"Tem"32\NotePad.Exe
    [Sys"Tem"32\NotePad.Exe] -------------------- [C:] [\Windows\Sys"Tem"32]
[NotePad] [.Exe]

Wine 3.0-rc6:

C:\windows>c:\Bin\ShowArg1 SysTem32\NotePad.Exe
    [SysTem32\NotePad.Exe] -------------------- [C:] [\windows\SysTem32]
[NotePad] [.Exe]

C:\windows>c:\Bin\ShowArg1 "SysTem32\NotePad.Exe"
    ["SysTem32\NotePad.Exe"] -------------------- [C:] [\windows\SysTem32]
[NotePad] [.Exe]

C:\windows>c:\Bin\ShowArg1 "SysTem32\NotePad".Exe
    ["SysTem32\NotePad".Exe] -------------------- [C:] [\windows\SysTem32]
[NotePad] [.Exe]

C:\windows>c:\Bin\ShowArg1 Sys"Tem32\NotePad".Exe
    [Sys"Tem32\NotePad".Exe] -------------------- [C:] [\windows\SysTem32]
[NotePad] [.Exe]

C:\windows>c:\Bin\ShowArg1 Sys"Tem"32\NotePad.Exe
    [Sys"Tem"32\NotePad.Exe] -------------------- [C:] [\windows\SysTem32]
[NotePad] [.Exe]