[TYPO3-core] RFC #10497: Mark t3lib_div::makeInstanceClassName() as deprecated

[Niels Pardon]

Hi Ingo!

Ingo Renner schrieb:
>> The only way to avoid this for an extension author is to have two
>> branches of his extensions. One which uses the way in<  4.3 and one
>> which uses the way in>= 4.3.
> 
> This is not the only way, but another quick possibility is the one
> outlined by Dmitry. However a branch would be a very clean way.

I don't understand why TYPO3 officially maintains two release lines but
an extension should not be able to support two release lines?

If we would have a "soft depreciation" without a warning in 4.3 then
extensions could still support 4.2 and 4.3. As soon as 4.4 comes out
support for 4.2 can be dropped by extension authors, too.

Greets,

Niels