[TYPO3-ect] drop support of PHP 4

[Ingo Renner]

Elmar Hinz wrote:

> So we will be able to support both for a while.

No, please don't do that!

That's exactly the reason why this switch project exists. It's the hen 
and egg problem. If you keep supporting php4, they won't switch to php5.

So please go full and only php5!

also remove that "function or variable name starts with underscore = 
private method or variable" crap. Just use the appropriate "private" 
declaration!


Ingo