[2]_ will be "2" (manually numbered),
[2]_ is mentioned more than once.
[2]_ actually three times
[#]_ will be "3" (anonymous auto-numbered), and
[#label]_ will be "1" (labeled auto-numbered).
Here is a symbolic footnote reference: [*]_.
Here is a symbolic footnote reference: [*]_.
Here is a symbolic footnote reference: [*]_.
Here is a symbolic footnote reference: [*]_.

.. [*] This is the footnote.

.. [*] This is the footnote.

.. [*] This is the footnote.

.. [*] This is the footnote.


Here is a citation reference: [CIT2002]_.

.. [CIT2002] This is the citation.  It's just like a footnote,
   except the label is textual.


.. [2] This footnote is labeled manually, so its number is fixed.

.. [#label] This autonumber-labeled footnote will be labeled "1".
   It is the first auto-numbered footnote and no other footnote
   with label "1" exists.  The order of the footnotes is used to
   determine numbering, not the order of the footnote references.

.. [#] This footnote will be labeled "3".  It is the second
   auto-numbered footnote, but footnote label "2" is already used.

