knot-resolver: update init script
This PR contains 2 MR. One for DOT and second fixes interface. Its created to follow workflow
https://gitlab.nic.cz/turris/turris-os-packages/-/merge_requests/381
https://gitlab.nic.cz/turris/turris-os-packages/-/merge_requests/375
Run tested on HBL
Edited by Vojtech Myslivec