Cargo Features

[dependencies]
async-rustls = { version = "0.4.2", default-features = false, features = ["dangerous_configuration", "early-data", "logging", "tls12", "quic"] }
default = logging, tls12

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

dangerous_configuration

Enables dangerous_configuration of rustls ^0.21

early-data
logging default

Enables logging of rustls ^0.21

tls12 default

Enables tls12 of rustls ^0.21

quic

Enables quic of rustls ^0.21

async-rustls has 6 features without comments.