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Add new "db:anonymize" command, that will scan all database for text that looks like e-mail (hopefully database is small enough) and replaces them based on DBG_EMAIL setting value.
Implementation details:
- create IDatabaseAnonymizer interface with "anonymizeDatabase()" method
- whoever wants (e.g. each module or unit) create a class (or use existing class), that would implement that interface and in that method anonymize it's own tables (e.g. mangle usernames, e-mail, anything else)
- or we can create base abstract class with some helper methods and let sub-class it and then discover sub-classes