#Mitra v3.7.0

https://codeberg.org/silverpill/mitra/releases/tag/v3.7.0
https://codeberg.org/silverpill/mitra-web/releases/tag/v3.7.0

This release includes a new server-level content filtering system:

- Rules are managed with mitractl and stored in the database - no need to edit the configuration file (commands: add-filter-rule, remove-filter-rule, list-filter-rules).
- blocked_instances and allowed_instances configuration parameters are still supported, but filter rules have higher priority.
- Wildcard patterns are supported.
- In addition to blocking activities, content filter can block media attachments (more actions will be added in the future).