Cargo Features

mdns-sd = { version = "0.10.1", default-features = false, features = ["async", "logging"] }
default = async, logging

These default features are set whenever mdns-sd is added without default-features = false somewhere in the dependency tree.

async default

Enables async of flume

channel between threads

logging default = log

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

log logging