Breaking: #73516 - GeneralUtility::getFileAbsFileName allows for typo3/ maindir specific paths

See Issue #73516

Description

The PHP method GeneralUtility::getFileAbsFileName used for resolving absolute paths has the option removed to only resolve relative paths or paths to the typo3/ main directory.

Impact

The two removed parameters are not evaluated anymore, thus always resolving any path, and additionally always relative to the PATH_site variable (the installations' base directory).

Affected Installations

Any installation with an extension using the removed options to fetch data relative to the typo3/ directory.

Migration

Use the EXT: syntax everywhere to resolve files within extension directories. If the path relative to the typo3/ main directory is explicitly needed, the constant TYPO3_mainDir can be used as a prefix to the file.