Implement parallel Happy Eyeballs as described in RFC 8305

What is the problem this feature will solve?

autoSelectFamily is enabled by default in Node.js 20. However, it does not properly implement parallel connection attempts, which are an integral part of the Happy Eyeballs algorithm. This can cause timeouts to occur that did not occur in versions prior to Node.js 20. See, for example, this discussion.

What is the feature you are proposing to solve the problem?

Implement the algorithm as described in Section 5 of RFC 8305:

Starting a new connection attempt does not affect previous attempts, as multiple connection attempts may occur in parallel.

What alternatives have you considered?

Disabling autoSelectFamily and restoring the pre-20 behavior, see https://github.com/nodejs/node/issues/47644#issuecomment-1554440759.

Empieza por la Section 5 de RFC 8305 y compara sus requisitos para los intentos de conexión en paralelo con el comportamiento actual de autoSelectFamily de Node.js. Usa la discusión enlazada y el comportamiento anterior a la versión 20 referenciado en el issue para entender la regresión; se considera terminado cuando los intentos de conexión puedan continuar en paralelo sin afectar a los intentos anteriores y se aborde el comportamiento de timeout notificado.