dns docs are missing that family = 0 for dns.lookup is allowed #28159

// The following are all expected to work
dns.lookup('www.google.com', 4, err => {
  console.log(err); // null
});
dns.lookup('www.google.com', 6, err => {
  console.log(err); // null
});
dns.lookup('www.google.com', err => {
  console.log(err); // null
});

// The following should error
try {
  dns.lookup('www.google.com', 1, () => {});
} catch (e) {
  console.log(e); // TypeError [ERR_INVALID_OPT_VALUE]: The value "1" is invalid for option "family"
}
try {
  dns.lookup('www.google.com', 2, () => {});
} catch (e) {
  console.log(e); // TypeError [ERR_INVALID_OPT_VALUE]: The value "2" is invalid for option "family"
}
try {
  dns.lookup('www.google.com', 3, () => {});
} catch (e) {
  console.log(e); // TypeError [ERR_INVALID_OPT_VALUE]: The value "3" is invalid for option "family"
}
try {
  dns.lookup('www.google.com', 5, () => {});
} catch (e) {
  console.log(e); // TypeError [ERR_INVALID_OPT_VALUE]: The value "5" is invalid for option "family"
}

// Asking about this one:
dns.lookup('www.google.com', 0, err => {
  console.log(err); // null <-- is this correct?
});