Example config: acme.sh

• Create a symlink for the hook:
  ln -s ~/acme-dns-inwx/scripts/acme.sh-desec ~/.acme.sh/dns_fnx_desec.sh
• Issue a test certificate:
  acme.sh --dns dns_fnx_desec --dnssleep 300 --test --issue -d 'example.org' -d '*.example.org'