(Title is sort of clickbait. The body is about how it isn't hard, but certain misconfigurations make it appear hard.) Note that curl itself also implements Hap

(Title is sort of clickbait. The body is about how it isn't hard, but certain misconfigurations make it appear hard.) Note that curl itself also implements Happy Eyeballs if you don't force a particular protocol via `-4` or `-6`. You can see it in action with `curl -vvvv https://opentalk.mailbox.org https://opentalk.mailbox.org`. So you shouldn't look at the author's example and extrapolate that `curl github.com` or `curl opentalk.mailbox.org` will fail in an IPv6 environment.