[TYPO3-core] RFC #14719: Automatically create ENABLE_INSTALL_TOOL file when 1-2-3 Install Tool is used

[Steffen Kamper]

Hi Jeff,

my feeling is that we need a solution for now and a better one in 4.5 
which needs time to discuss and develop.

So here is my +1 by reading and testing v2, so this one is ready for commit.

vg Steffen