[PATCH 0/3] MR9450: Don't replace WINE_HOST_ variables if they already exist in the environment.

[Alexandre Julliard (＠julliard)]

This makes it possible to override the host value seen by Wine of
e.g. XDG_DATA_DIRS by setting WINE_HOST_XDG_DATA_DIRS directly.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9450