TYPO3 Core

Same reasons as given in issue #18480 and #18480, that the documentation says the class is to never be instantiated, thus let us use the PHP5 capabilities to enforce this.

The patch does the following:
1) Sets class to 'final'.
2) Sets all functions to 'public static'
3) Replaces tabs between function signature and body with a space.
4) Inserts spaces around = where appropriate according to CGL.
5) Inserts a space after commas where appropriate according to CGL.

(issue imported from #M7909)