TYPO3 Core

The identifiers for the caching framework must currently adhere to this pattern:

^[a-zA-Z0-9_%\\-&]{1,250}$

I think this pattern is too strict. Some cache identifiers could contain arbitrary characters. Since allowing arbitrary characters is not a good idea, one should encode these values. Base64 comes to mind, but that wouldn't be allowed, too - equal signs are not allowed.

So please add at least the equals sign to the pattern.