[Feature Request] DNS lookup func for "problematic" IPs

Hello!

One another idea, inspired by #19612

Shodan outputs DNS lookup for "problematic" IP: https://www.shodan.io/host/195.135.223.50

Propostion:

1. in info window to add "DNS lookup" func for IP-based trails

1. Check, if domain(-s) from "DNS lookup" is/are present in data/whitelist.txt and, if yes, to mark/highlight it/them as "whitelisted by Maltrail".