Fix mirror site list of downloads in ko.
Merge pull request #564 from marocchino/ko-fix-minor-site-in-download

Update downloads (ko)
Update security (ko)
Merge pull request #532 from marocchino/ko-security

Update security (ko)
Add missing newline in quickstart code sample [translations]
Announce 1.9.3 EOL
Update timestamp to today
rewrite
rename
update dependency
Change Decimal to Rational (issue 8430)
Merge pull request #565 from marocchino/fix-rational

Change Decimal to Rational (de, en, es, fr, id, it, ko, pl, ru, vi)