cmd/cli,internal/router: detect unbound/dnsmasq status correctly on *BSD

Also detect cd mode for stop/uninstall command correctly, too.

cmd/cli/control_server.go

@@ -21,6 +21,7 @@ const (
 	startedPath      = "/started"
 	reloadPath       = "/reload"
 	deactivationPath = "/deactivation"
+	cdPath           = "/cd"
 )
 
 type controlServer struct {
@@ -171,6 +172,13 @@ func (p *prog) registerControlServerHandler() {
 		}
 		w.WriteHeader(code)
 	}))
+	p.cs.register(cdPath, http.HandlerFunc(func(w http.ResponseWriter, request *http.Request) {
+		if cdUID != "" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+		w.WriteHeader(http.StatusBadRequest)
+	}))
 }
 
 func jsonResponse(next http.Handler) http.Handler {