[TYPO3-core] RFC #9355: Add an error and exception handler (backported from FLOW3)

[Rupert Germann]

Steffen Kamper schrieb:
  > * $TYPO3_CONF_VARS['SYS']['exceptionHandler'] should be empty by
> default. Imho the release should be configured as most performant 
> system, it looks odd to me to have to reconfigure to get it faster.

good point.

greets
rupert