dns: TTL for TXT entries #39399

The dns.lookupTxt() function returns the TXT entries but omits the TTL entries. This is a problem if one intends to add a cache on top of lookupTxt()

Describe the solution you'd like

Probably the best I could see is to have an option for lookupTxt in the form of { ttl: true } that returns a value + ttl object instead of a simple string:

dns.lookupTxt('domain', { ttl: true }, (err, data) => {
  data[0].value // text entry
  data[0].ttl // ttl number
})