DNSR-703 — Token does not start with 00 or 11 bits couple
Token at specified offset starts with bits 01 or 10. This is not allowed according to RFC 1035. Current version of dns-proxy does not implement DNS extensions (e.g. RFC 2671).
In case of query, request is rejected with FormErr response code.
In case of reply, whole answer is ignored and next server is tried.