Cargo Features

[dependencies]
ippper = { version = "0.3.0", default-features = false, features = ["server"] }
default = server

The server feature is set by default whenever ippper is added without default-features = false somewhere in the dependency tree.

server default = hyper, hyper-util, tokio

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.

hyper server
hyper-util server
tokio server