NLS updates, most notably fixed zh_TW translations

src/backend/po/nls.mk

src/backend/po/zh_TW.po

src/bin/pg_dump/de.po

src/bin/pg_dump/nls.mk

src/bin/pg_dump/zh_TW.po

src/bin/psql/nls.mk

src/bin/psql/zh_TW.po

src/interfaces/libpq/de.po

src/interfaces/libpq/nls.mk

src/interfaces/libpq/ru.po

src/interfaces/libpq/zh_CN.po

src/interfaces/libpq/zh_TW.po

src/nls-global.mk