[TYPO3-core] RFC #9520: add a scheme to support singletons with t3lib_div::makeInstance

[Martin Kutschker]

Ingo Renner schrieb:
> 
> For existing classes: They stay as they are for compatability reasons
> and are considered "exceptions"

Why? PHP is case insensitive, so we can change the case even of old
classes and functions.

I suggest we normalize the case to our new scheme and change the within
the Core to ensure consistency.

Masi