Checklist
Description
libp2p.direct subdomains are deterministically resolvable without needing to use the OS resolver.
Note: perhaps there's an alternative way to remove pressure on the OS DNS resolver by getting go-libp2p to prefer dialing addresses that don't require DNS resolution until later, but that is likely both more complex and requires getting the changes into go-libp2p. This approach can just use the custom resolver code we already have in place that allows for handling specific domains (e.g. custom resolution for .eth domains).
Checklist
Description
libp2p.direct subdomains are deterministically resolvable without needing to use the OS resolver.
Note: perhaps there's an alternative way to remove pressure on the OS DNS resolver by getting go-libp2p to prefer dialing addresses that don't require DNS resolution until later, but that is likely both more complex and requires getting the changes into go-libp2p. This approach can just use the custom resolver code we already have in place that allows for handling specific domains (e.g. custom resolution for .eth domains).