[TASK] Combine all TYPO3_CONF_VARS into one recursively merged array (#1759)
[TASK] Combine all TYPO3_CONF_VARS into one recursively merged array (#1759)

This will make it easier for developers to add keys or new sections to
the TYPO3_CONF_VARS. Also it won't run into problems when keys are not
set by the DefaultConfiguration.php


rfay/ddev,rfay/ddev,drud/ddev,rfay/ddev,rfay/ddev,drud/ddev,rfay/ddev,drud/ddev,drud/ddev,drud/ddev