better comment about why gnu tar
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@ -126,7 +126,8 @@ func DirToBox(dst, dir string, ui packer.Ui, level int) error {
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return err
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}
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// workaround for large archive formats on go >=1.10
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// go >=1.10 wants to use GNU tar format to workaround issues in
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// libarchive < 3.3.2
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setHeaderFormat(header)
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// We have to set the Name explicitly because it is supposed to
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