[horde] [i18n] French translation update

[Jean Charles Delépine]

Hy Ralf,

I've submitted two pull requests for the Horde Base module:

     #19: Update of the French translation of Horde_Base

     #18: Fix a typo in horde-translation

Feel free to take a look — even if just with your good hand.
Wishing you a smooth recovery.

            Jean Charles Delépine

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