Enhance error message in case of not trusted domains

We've run into the message:

Possible phishing attack, attempting to redirect to https://xxx, this request has been blocked. If the request was legitimate, add the domain related to this request in the list of trusted domains in the configuration.

That would be great to specify: 1) which configuration file is it about (xwiki.cfg or xwiki.properties) 2) that it is about the directive url.trustedDomains