Allow users to extend the fail2ban configuration

[vcbranco]

Whenever I configure fail2ban with "abuseIPDB" service ( https://www.abuseipdb.com ), the settings I added are always replaced by NCP fail2ban configuration. It would be great that it could be possible to set the API key and the configuration of the service in the Fail2ban menu. Unfortunately I'm not a developer for what I can only help with ideas and testing.

[ZendaiOwl]

Could you perhaps add an example of your configurations? (Excluding your API key and such info of course)

Ex. If you add the settings in a jail.local file in /etc/fail2ban/jail.d the settings should persist if I'm not mistaken