Breaking: #82421 - Dropped old DB related configuration options

Description

Some configuration options related to pre-doctrine era have been removed from $GLOBALS['TYPO3_CONF_VARS'] :

• SYS/sqlDebug - Obsolete since core version 8, no substitution
• SYS/setDBinit - Obsolete since core version 8 and migrated automatically
• SYS/no_pconnect - Obsolete since core version 8 and migrated automatically
• SYS/dbClientCompress - Obsolete since core version 8 and migrated automatically

Impact

Extension code usually shouldn't rely on these settings.

Affected Installations

Instances with extension code using these array entries in $GLOBALS['TYPO3_CONF_VARS'] are found by the install tool extension scanner.

Migration

Extension code should not rely on these core framework internal settings.