update translations, bump -20-rc

.tx/config

apps/i2psnark/locale/messages_ar.po

apps/i2psnark/locale/messages_cs.po

apps/i2psnark/locale/messages_de.po

apps/i2psnark/locale/messages_es.po

apps/i2psnark/locale/messages_fr.po

apps/i2psnark/locale/messages_hu.po

apps/i2psnark/locale/messages_it.po

apps/i2psnark/locale/messages_nb.po

apps/i2psnark/locale/messages_nl.po

apps/i2psnark/locale/messages_pl.po

apps/i2psnark/locale/messages_pt.po

apps/i2psnark/locale/messages_pt_bR.po

apps/i2psnark/locale/messages_ru.po

apps/i2psnark/locale/messages_sk.po

apps/i2psnark/locale/messages_sv.po

apps/i2psnark/locale/messages_vi.po

apps/i2psnark/locale/messages_zh.po

apps/i2ptunnel/locale-proxy/messages_pt_BR.po

apps/i2ptunnel/locale-proxy/messages_sv.po