Replace unsafe `security_attributes` function with safe `inherit_handle` alternative
The `security_attributes` function is marked as safe despite taking a raw pointer which will later be used. Fortunately this function is only used internally and only in one place that has been basically the same for a decade now. However, we only ever set one bool so it's easy enough to replace with something that's actually safe.
In the future we might want to expose the ability for users to set security attributes. But that should be properly designed (and safe!).
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