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7448fde157
Connections are established using the "happy eyeballs" approach from RFC 8305, i.e. new addresses (if available) are tried if the prior address has already had a reasonable time to connect. This prevents waiting too long on a failed connection but does not try all the addresses at once. Prior connections that are still waiting are rechecked periodically if no subsequent connection is successful. This improves substantially on 39bb8a0, which failed to take into account connection attempts that do not fail (but never connect) and use up all the available time.