Cargo Features

[dependencies]
multiaddr = { version = "0.18.1", default-features = false, features = ["url"] }
default = url

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

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.

url default