+=head1 ENVIRONMENT
+
+=over
+
+=item NAODASH_CACHE
+
+Path to a directory that should be used to cache xlogfiles downloaded
+from NAO, or the special value 'none' (case-insensitive) to disable
+caching.
+
+By default a directory named 'naodash' in the default temporary
+directory (C<< File::Spec->tmpdir >>) is used.
+
+=back
+