Breaking: #98487 - $GLOBALS['PAGES_TYPES'] removed 

See forge#98487

Description 

The global array PAGES_TYPES has been removed in favor of a new registry class containing the shared state.

Impact 

Accessing or modifying $GLOBALS['PAGES_TYPES'] will have no effect anymore.

Affected installations 

TYPO3 installations with custom extensions creating custom TCA records or custom Page Doktypes.

Migration 

Use the new \TYPO3\CMS\Core\DataHandling\PageDoktypeRegistry class to register custom page types with their dependency what kind of records should be allowed for creation, or to read the information what record types are allowed on a specific pages.doktype.