+* New option --one-top-level
+
+The option --one-top-level tells tar to extract all files into a
+subdirectory named by the base name of the archive (minus standard
+compression suffixes recognizable by --auto-compress). When used with
+an argument, as in --one-top-level=DIR, the files are extracted into the
+supplied DIRectory. This ensures that no archive members are
+extracted outside of the specified directory, even if the archive is
+crafted so as to put them elsewhere.
+