Anonymization instead of deletion

[mgrundkoetter]

It would be very handy for further data integrity, to just overwrite database records with dummy data instead of really deleting the records from the database. This could be configured in the TS settings for each table like fieldname = dummyvalue. It should also be possible to set whether overwriting or deleting should be done on a per-table basis. Deletion should then not be default any more for data integrity reasons.

[mgrundkoetter]

Overall functionality of anonymization is done. The per-table feature is not yet in. Could be done via check boxes in the backend module and via a new --limit-to-tables parameter on the cli.