GetDynamicTimeZoneInformation, SetDynamicTimeZoneInformation and
GetTimeZoneInformationForYear are provided by the Windows SDK accordingly
with ethe MSDN cocumentation for SDK with versions above 7.1A.
Those functions are incorrectly included by the 7.1A SDK if _WIN32_WINNT
>= 0x0501 instead of _WIN32_WINNT >= 0x0600.
The issue arises when building with an XP compatible toolset (e.g.
v120_xp).
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