Neither sbsign nor pesign set this flag in SpcPeImageData->flags, which is about which resources should be included specifying "Which portions of the Windows PE file are hashed." according to the authenticode spec. However, this is followed by "Although flags is always present, it is ignored when calculating the file hash for both signing and verification purposes". So as it doesn't seem to do anything useful and the other tools don't set any of these flags either, let's follow suite and not set this flag ourselves either.
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