Breaking: #73602 - Short-URL without ?id=ID removed

See Issue #73602

Description

The support for resolving URLs using index.php?23 instead of index.php?id=23 with no real GET parameter given has been removed.

The method $TSFE->setIDfromArgV() has been removed as well.

Impact

Calling a frontend page with the short-handed URL will result in not detecting a page ID at all.

Calling $TSFE->setIDfromArgV() directly within PHP will result in a fatal PHP error.

Affected Installations

Any TYPO3 installation with an extension using the pre-4.0 syntax.

Migration

Use the proper index.php?id=23 when using URLs to be called in the frontend.