silverpill@adiz add-filter-rule is a different system. It stores rules in the database and is more powerful. It can remove media attachments without blocking instance entirely, and eventually will be able to do other things like removing profile images and hiding posts from the federated timeline (similar to Pleroma's MRF). Since rules are stored in database, they can be edited from a web client too (though that hasn't been implemented yet). And you can combine mitractl with other command line utils to load rules from a CSV file.
The new system is intended to be a replacement for configuration parameters.
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