Update cache framework to latest FLOW3 version
Update the caching framework to FLOW3 version 868e073b98
- [!!!][FEATURE] Make cache backends more flexible
This change makes cache backends more flexible. It adds a new
interface "TaggableBackendInterface" and a new "SimpleFileBackend".
The latter does not support tagging but is faster in certain cases
(where with a lot of tags/entries flushing everything is faster than
flushing by tag).
If you have implemented a cache backend and support tagging, you must
add the "TaggableBackendInterface" to the list of interfaces implemented
by your backend.
- [BUGFIX] Fix default lifetime use in cache backend
- [FEATURE] Freezable Cache Backend
Introduce a new type of cache backends which supports freezing.
In a frozen state no modifications are allowed and thus enables the
cache implementation to optimize its tasks for speed.
The FileBackend was extended to support freezing.