Cargo Features

[dependencies]
s3-ext = { version = "0.5.1", default-features = false, features = ["rustls"] }
default = rustls

The rustls feature is set by default whenever s3-ext is added without default-features = false somewhere in the dependency tree.

rustls default

Enables rustls of rusoto_core and rusoto_s3

S3Ext has 2 features without comments.