message: Fix msan use-of-unitialized-value
diff: @@ -518,6 +518,7 @@ bool ContextImpl::verifySubjectAltName(X509* cert,
  case GEN_IPADD: {
  if (san->d.ip->length == 4) {
  sockaddr_in sin;
  + sin.sin_port = 0;
  sin.sin_family = AF_INET;
  memcpy(&sin.sin_addr, san->d.ip->data, sizeof(sin.sin_addr));
  Network::Address::Ipv4Instance addr(&sin);
  @@ -528,6 +529,7 @@ bool ContextImpl::verifySubjectAltName(X509* cert,
  }
  } else if (san->d.ip->length == 16) {
  sockaddr_in6 sin6;
  + sin6.sin6_port = 0;
  sin6.sin6_family = AF_INET6;
  memcpy(&sin6.sin6_addr, san->d.ip->data, sizeof(sin6.sin6_addr));
  Network::Address::Ipv6Instance addr(sin6);
  