Upload JFritz Phonebook to FritzBox

[Giulioski]

This would be very nice if we could upload our phone book from JFritz to a user select phone book.
FritzBox can have multiple phonebooks therefore user should choose which one to use for the upload.
Best would be a sync feature between JFritz and a selected FritzBox phone book.

[herrdeh]

Best would be a sync feature between JFritz and a selected FritzBox phone book.

As there is carddav2fb, an actively maintained package, I feel that's a "must-have" - and my strong wish. Therefore, to me FritzBox===>JFritz is even more important than vice versa.