Cargo Features

tiny_http_sccache has no features set by default.

[dependencies]
tiny_http_sccache = { version = "0.7.0", features = ["ssl"] }
ssl = 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.

openssl ssl?