We want to maintain configurable rlist of regex patterns describing the tags which can be ignored when deciding whether or not to cache page and be able to insert e.g. a regex for utm_* tags into that list.

In the cache project, a RequestHasParametersVoter is to be refactored to allow for a whitelist of patterns. This way users would specify the sites with tracking tags (as a regex) they would like to return cached.

user would set the pattern (alter the whitelist) in configuration/modules/cache/config/contentCaching