Merge "authorization_set.cpp: relax serialization of unknown tags"

template <>

struct choose_serializer<> {

    static OutStreams& serialize(OutStreams& out, const KeyParameter& param) {

        LOG(FATAL) << "Trying to serialize unknown tag " << unsigned(param.tag)

        LOG(ERROR) << "Trying to serialize unknown tag " << unsigned(param.tag)

                   << ". Did you forget to add it to all_tags_t?";

        abort();

        return out;

    }

};