Handling of worksheet functions from Excel 2010 and newer

[Winfried Donkers]

Hi Eike,

>Which reveals that our CONFIDENCE.T calculation seems to be wrong, there
>it results in 0.0837211385 whereas Excels calculates it as 1.5223611251

>Could you please investigate?

Fixed with https://gerrit.libreoffice.org/#/c/6751/
I misread the background information and didn't have an original xlsx-document 
containing the function at the time I submitted the first patch.

Winfried