[horde] [i18n] French translation update

[Jean Charles Delépine]

Hello,

I’ve started updating the French translation. The last update was from  
2013 by Paul De Vlieger, whose email domain no longer exists.

The i18n mailing list hasn’t seen any messages since 2018, so I’ll  
reserve the announcement for the horde list instead.

The Core translation is ready, and I’ll prepare a PR this morning.

Best regards,
Jean Charles Delépine
-- 
Service systèmes et réseaux - DISI

Université de Picardie Jules Verne
5, rue du moulin neuf - 80000 Amiens

-- 
Service systèmes et réseaux - DISI

Université de Picardie Jules Verne
5, rue du moulin neuf - 80000 Amiens