Privacy options applied for single site (anonimyse IP, opt-out, etc.) #6653

Hi
We Received following request:
"We would like to be able to set a privacy policy per site.
At the moment this setting is instance wide, however in a shared environment this is not flexible enough."

Thanks for the suggestion, it would be a useful feature, I set it to Mid term milestone

see also Separate opt-out for each site #6505

as suggested by @RMastop in https://github.com/piwik/piwik/issues/6769 we ideally should let user configure "Delete old visitors logs" and "Delete old reports" separately for each website.