Feature: #22439 - Allow nested GET-params in config.linkVars

See forge#22439


TypoScript setting config.linkVars configures which parameters should be passed on with links in TYPO3. It is now possible to specify nested GET parameters there.


config.linkVars = L(0-2),tracking|green(0-5)

With the above configuration the following example GET parameters will be kept:


But a get parameter like tracking[blue] will not be kept.

The value constraint in round brackets works in the same way as for not nested GET parameters.