Adds special taxes used in sales and purchase of alcoholic beverages. [FIX] l10n_cl: change percentage amount of "retencion de segunda categoría" to the value changed by law in year 2020 closes odoo/odoo#48804 X-original-commit: c7592d614728ded8e6a9faa570a49b370515ecea Signed-off-by: Josse Colpaert <jco@openerp.com>