Cargo Features

tailsrv has no features set by default.

[dependencies]
tailsrv = { version = "0.9.1", features = ["systemd"] }
systemd = sd-notify, tracing-journald

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.

sd-notify systemd?
tracing-journald systemd?