IPv6: classify entire fc00::/7 as private use#104
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`isPrivateUse()` only matched the locally-assigned half (`fd00::/8`) of the Unique Local Address block, while `isUniqueLocal()` matched the full `fc00::/7`. Fix disparity between `isPrivateUse()` and `isUniqueLocal()` by widening to report the entire block as private, as per RFC 4193.
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isPrivateUse()only matched the locally-assigned half (fd00::/8) of the Unique Local Address block, whileisUniqueLocal()matched the fullfc00::/7. Fix disparity betweenisPrivateUse()andisUniqueLocal()by widening to report the entire block as private, as per RFC 4193.