Maintenance and feature release.
Database update required.
Changelog:
- added new db table column 'type' to use in add-on modules;
- some admin UI improvements;
- option set pager for number of items per page;
- check IP status in AbuseIPDB from main admin UI;
- added known issues section to README.md - resolve #16;
- added option to import D7 blocked_ips - resolve #17.
