[PATCH 0/3] MR6178: ntdll: Use environ/_NSGetEnviron() directly rather than caching it in main_envp.

[Brendan Shanks (＠bshanks)]

Fixes an unpredictable use-after-free crash on launch on macOS.
Also, use `_NSGetEnviron()` instead of `environ` in `msv1_0` and `ntdll`.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57005

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6178