cmd/stepd: Surpress some go vet warnings

cmd/stepd/main.go

@@ -201,16 +201,15 @@ func main () {
 	}
 
 	// set up the HTTP server
-	httpServer := http.Server {
+	httpServer := httpServerRoutine {
 		Addr:    config.Get("http.address"),
 		Handler: &handler,
 	}
-	httpServerRoutine := httpServerRoutine(httpServer)
 
 	// set up the routine manager
 	manager := routines.Manager {
 		Routines: []routines.Routine {
-			&httpServerRoutine,
+			&httpServer,
 		},
 	}
 	
@@ -230,9 +229,10 @@ func (this *httpServerRoutine) Run (ctx context.Context) error {
 	server := http.Server(*this)
 	go func () {
 		<- ctx.Done()
-		shutdownCtx, _ := context.WithTimeout (
+		shutdownCtx, done := context.WithTimeout (
 			context.Background(),
 			16 * time.Second)
+		defer done()
 		server.Shutdown(shutdownCtx)
 	} ()
 	err := server.ListenAndServe()