GHSA-W5W5-8VFH-XCJQ whoami stack buffer overflow on several Unix platforms

With versions of the whoami crate = 0.5.3 and = 0.5.3 and 1.0.1, calling any of the above functions also leads to a stack buffer overflow on these platforms: - Bitrig - DragonFlyBSD - FreeBSD - NetBSD - OpenBSD This occurs because of an incorrect definition of the passwd struct on those platforms...