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

[Martin Kutschker]

Martin Kutschker schrieb:
> This is a SVN patch request.
> 
> Branches: trunk
> 
> Description:
> 
> Let makeInstance test if an object implements the t3lib_singleton
> interface and if so keep a reference for later use.
> 
> Don't let the class itself store the instances because this won't work
> well with unit tests.

Commited as is (with a lower case class name).

As there is no real naming convention in place and most existing code
uses lower case I leaf the uppercasing of all classes to be done in a
single refactoring patch.

Masi