[TYPO3-dev] Get extKey from classname

[Steffen Kamper]

Hi,

there is no possibility to get extKey from a classname. The other way is 
implemented in t3lib_extMgm, but it'S not possible to revert again.

Any ideas? I thought about adding classnames of extension to 
$TYPO3_LOADED_EXT

vg Steffen