#!/bin/bash
DOMAIN=$(expr match "$CERTBOT_DOMAIN" '.*\.\(.*\..*\)')
CHALLENGE_DOMAIN="_acme-challenge.${CERTBOT_DOMAIN}"
knotc zone-begin ${DOMAIN}
knotc zone-unset ${DOMAIN} _acme-challenge.${CERTBOT_DOMAIN}. TXT
knotc zone-commit ${DOMAIN}