Cargo Features
Iron has no features set by default.
[dependencies]
iron = { version = "0.6.1", features = ["native-tls-example"] }- native-tls-example = hyper-native-tls
Features from optional dependencies
In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.