Cargo Features

ftp-rs has no features set by default.

[dependencies]
ftp-rs = { version = "0.2.0", features = ["ftps"] }
ftps = tokio-rustls

Enable support of FTPS which requires openssl

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-rustls ftps?

Enables tokio-rustls ^0.23.3