Document use of systemd notify protocol, in the usage message

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/server/server.rs b/server/server.rs
index 0cd449caa152f1afba966159a7b50c2600b33244..82cb47e14712bbe74a1f22f2af084bd6bb9bf2f2 100644 (file)
--- a/server/server.rs
+++ b/server/server.rs
@@ -28,6 +28,10 @@ pub struct Opts {
   pub config: config::CommonOpts,
 
   /// Daemonise
+  ///
+  /// Regardless of this option, hippotatd will perform
+  /// the systemd readiness notify protocol, if `NOTIFY_SOCKET` is set.
+  /// (See `sd_notifhy(3)`.)
   #[clap(long)]
   daemon: bool,