[TYPO3] obsolete extensions

[Xavier Perseguers]

> Any extension should *always* define the upper bound to be at most the 
> current release of TYPO3, it should not be possible to leave it empty, 
> saying that it will be compatible with all upcoming releases. A user 

EM could do this automatically as the developer is the only entitled 
person to be able to assert that his extension is compatible with the 
version of TYPO3 he is currently running. And he certainly will always 
test it with the latest release. He cannot assert it is compatible with 
4.2.1 when he does not test it himself.

As such, I think that EM could update the upper bound of this value 
accordingly. That is in a first phase, a patch to the core could be 
sufficient.

-- 
Xavier Perseguers
http://xavier.perseguers.ch/en/tutorials/typo3.html