[Mailman-i18n] Last chance to update for 2.1.6 final

I just wanted to let all language champions know that this is your last chance to update your translations for 2.1.6 final. With 2.1.6rc3 and the last couple of post-rc3 changes, I'm feeling pretty good about this release. I'd like to see us get it out by the end of this month, if not a little sooner. So please finish and checkin, or submit, your updates for 2.1.6 final within the next week. If you have some important pending changes that you need a little more time for, please let Tokio and myself know as soon as possible. Thanks! -Barry