TYPO3 Core

It's really useful for detecting deprecated calls. However the logging is imho to static:
1) you only can switch it on / off
2) if on it writes always to file and to dev log which floods both

The patch adds a finer switch

$TYPO3_CONF_VARS['SYS']['enableDeprecationLog'] = 'file,log,console'

'file' - write to file
'log' - write to dev log
'console' - show in debug console

(issue imported from #M14339)