Reduces cache lookups by 50% by changing logic of how tag information is
stored to avoid having to look it up on getItem(s) calls.
For Filesystem symlinks are used, for Redis "Set" datatype is used.
* 4.2:
Fix Cache error while using anonymous class
[Cache] fix LockRegistry
Update validators.cs.xlf
Make translations consistent with other translations.
Correct language code for ukrainian language in security translations.
Fix return type of Request::getRequestFormat
[Cache] Fix perf when using RedisCluster by reducing roundtrips to the servers