Cargo Features

dns-parser has no features set by default.

dns-parser = { version = "0.8.0", features = ["with-serde"] }
with-serde = serde, serde_derive

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.

serde with-serde?
serde_derive with-serde?