[Bug 57024] msiexec parses quotes in public properties differently from Windows

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57024

--- Comment #5 from Hans Leidekker  ---
(In reply to asger from comment #4)
> (In reply to Hans Leidekker from comment #3)
> > Fixed with 14b718b69bb8d62c3ae84c52d4210e81c1d21208. Thanks for the bug
> > report.
>
> You seem to have fixed some cases.
>
> However these cases still fails for me with `wine-9.16-105-g055bddab4f1` (C
> source code):
> execlp("msiexec", "msiexec", "/i", msi_path, "/qn", "MY_PROPERTY=\"foo
> bar\"", NULL);
>   Got `"foo bar"`, should be `foo bar`
>
> execlp("msiexec", "msiexec", "/i", msi_path, "/qn", "MY_PROPERTY=\"\"\"\"",
> NULL);
>   Got ``, should be `"`
>
> execlp("msiexec", "msiexec", "/i", msi_path, "/qn",
> "MY_PROPERTY=\"\"\"\"\"\"", NULL);
>   Got ``, should be `""`
>
> execlp("msiexec", "msiexec", "/i", msi_path, "/qn",
> "MY_PROPERTY=\"{\"\"foo\"\": [1, 2], \"\"bar\"\": {\"\"baz\"\":
> \"\"qux\"\"}}\"", NULL);
>   No file created, should be `{"foo": [1, 2], "bar": {"baz": "qux"}}`

Well, there's more than one bug here. The next one is that msiexec adds quotes
even when the value is already quoted.