[TYPO3-core] FYI: !!! #15171: Add an Update Wizard to install the new sysexts

[Steffen Gebert]

+1 by reading, if you explain me the reason of the following two lines:

> +			t3lib_div::debug(array_keys($this->pObj->INSTALL['update']['installSystemExtensions']['sysext']));
> +			t3lib_div::debug($extArray);

Steffen