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more generally available. (stop_transaction): Ditto. (unlink_nt): Potentially start transaction when trying to delete file with DOS R/O attribute set. If file is .lnk symlink, check for number of hardlinks. Add "out" label and only return via "out". Rearrange reversion of DOS R/O attribute and, on success, only revert R/O attribute if file is .lnk symlink with more than one hardlink. Add length comment to explain why.
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