cygwin: doc: Add keywords for ACE order issues
Windows Explorer shows a warning with Cygwin-created DACLs, but putting the text of the warning into Google doesn't lead to the relevant Cygwin docs. Let's copy the warning text into the docs in the hopes of helping confused users. Most of the credit for the wording belongs to Yaakov Selkowitz. Latest inquiry: <https://cygwin.com/pipermail/cygwin/2020-May/244814.html> Signed-off-by: David Macek <david.macek.0@gmail.com>
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@ -2159,11 +2159,13 @@ will correctly deal with the ACL regardless of the order of allow and
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deny ACEs. The second rule is not modified to get the ACEs in the
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deny ACEs. The second rule is not modified to get the ACEs in the
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preferred order.</para>
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preferred order.</para>
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<para>Unfortunately the security tab in the file properties dialog of
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<para>Unfortunately, the security tab in the file properties dialog of
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the Windows Explorer insists to rearrange the order of the ACEs to
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the Windows Explorer will pop up a warning stating "The permissions on
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canonical order before you can read them. Thank God, the sort order
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... are incorrectly ordered, which may cause some entries to be
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remains unchanged if one presses the Cancel button. But don't even
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ineffective." Pressing the Cancel button of the properties dialog
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<emphasis role='bold'>think</emphasis> of pressing OK...</para>
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fortunately leaves the sort order unchanged, but pressing OK will cause
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Explorer to canonicalize the order of the ACEs, thereby invalidating
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POSIX compatibility.</para>
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<para>Canonical ACLs are unable to reflect each possible combination
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<para>Canonical ACLs are unable to reflect each possible combination
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of POSIX permissions. Example:</para>
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of POSIX permissions. Example:</para>
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