[Typo3-documentation] Wiki: Default text

[Jean-Marie Schweizer]

> The text wikipedia displays is better:
> 
>    "Wikipedia does not yet have an article with this name.
>    To start the article, click [edit this page]"
> 
> see: http://en.wikipedia.org/wiki/ThisDoesNotExist

I took the liberty to just copy the above text the [ThisDoesNotExit].

If I underminded somebody's thoughts please forgive me and change it back.

Jean-Marie