When running many operations in new DataHandler instances each time
the typo3_forum-CacheManager tries to delete temporary files. This patch
changes the behaviour to only do so if the table name the hook was
called for contains a table which is used in EXT:typo3_forum
When running many operations in new DataHandler instances each time the typo3_forum-CacheManager tries to delete temporary files. This patch changes the behaviour to only do so if the table name the hook was called for contains a table which is used in EXT:typo3_forum