[TYPO3-core] RFC: #11265: function getTreeList() doesn't use the caching framework

[Rupert Germann]

small update,

I wondered why there are id fields with auto_increment in all new cache_*
tables although these columns are not used by the caching framework.
The bugtracker has several entries concerning problems with missing auto_inc
fields and mysql replication:

http://bugs.typo3.org/view.php?id=11184
http://bugs.typo3.org/view.php?id=10496
http://bugs.typo3.org/view.php?id=10508

So I added the id (auto_inc) column to the cache_treelist table, and set a
new index for identifier.
that's the only change compared to v2.

greets
rupert