add identifier as on TYPO3 cache tables to file storage in database and allow deleting of cached pages by identifier

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/nc_staticfilecache/trunk@76283 735d13b6-9817-0410-8766-e36946ffe9aa
[TASK] Clean up code by removing trailing spaces

Fixes: #49140

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/nc_staticfilecache/trunk@76570 735d13b6-9817-0410-8766-e36946ffe9aa
[BUGFIX] Fix compatibility for TYPO3 6.0 and above

Fixes: #47010, #47899, #45914

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/nc_staticfilecache/trunk@76571 735d13b6-9817-0410-8766-e36946ffe9aa