Cargo Features

[dependencies]
async-std-resolver = { version = "0.24.1", default-features = false, features = ["system-config"] }
default = system-config

The system-config feature is set by default whenever async-std-resolver is added without default-features = false somewhere in the dependency tree.

system-config default

resolver configuration

Enables system-config of hickory-resolver

Affects async-std-resolver::resolver_from_system_conf