[1.1.X] Fixed #8468 - Updated class names in docs of Polish local flavor.

Poland (``pl``)

===============

.. class:: pl.forms.PLNationalIdentificationNumberField

.. class:: pl.forms.PLPESELField

    A form field that validates input as a Polish national identification number

    (PESEL_).

.. _PESEL: http://en.wikipedia.org/wiki/PESEL

.. class:: pl.forms.PLNationalBusinessRegisterField

.. class:: pl.forms.PLREGONField

    A form field that validates input as a Polish National Official Business

    Register Number (REGON_), having either seven or nine digits. The checksum

    A form field that validates input as a Polish postal code. The valid format

    is XX-XXX, where X is a digit.

.. class:: pl.forms.PLTaxNumberField

.. class:: pl.forms.PLNIPField

    A form field that validates input as a Polish Tax Number (NIP). Valid

    formats are XXX-XXX-XX-XX or XX-XX-XXX-XXX. The checksum algorithm used

    for NIPs is documented at http://wipos.p.lodz.pl/zylla/ut/nip-rego.html.

.. class:: pl.forms.PLAdministrativeUnitSelect

.. class:: pl.forms.PLCountySelect

    A ``Select`` widget that uses a list of Polish administrative units as its

    choices.

.. class:: pl.forms.PLVoivodeshipSelect

.. class:: pl.forms.PLProvinceSelect

    A ``Select`` widget that uses a list of Polish voivodeships (administrative

    provinces) as its choices.