Cargo Features

[dependencies]
http-connection = { version = "0.1.0", default-features = false, features = ["tcp"] }
default = tcp

The tcp feature is set by default whenever http-connection is added without default-features = false somewhere in the dependency tree.

tcp default = tokio-tcp

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.

tokio-tcp tcp