Snap for 6342437 from bbdfd078 to rvc-release

std::string ToString(const addrinfo* ai) {

    if (!ai) return "<null>";

    for (const auto* aip = ai; aip != nullptr; aip = aip->ai_next) {

    char host[NI_MAXHOST];

        int rv = getnameinfo(aip->ai_addr, aip->ai_addrlen, host, sizeof(host), nullptr, 0,

    int rv = getnameinfo(ai->ai_addr, ai->ai_addrlen, host, sizeof(host), nullptr, 0,

                         NI_NUMERICHOST);

    if (rv != 0) return gai_strerror(rv);

    return host;

}

    return "<invalid>";

}

std::string ToString(const ScopedAddrinfo& ai) {

    return ToString(ai.get());