qrexec_daemon: print dots when waiting for agent

qrexec/qrexec_daemon.c

@@ -53,6 +53,7 @@ int server_fd;
 
 void handle_usr1(int x)
 {
+	fprintf(stderr, "connected\n");
 	exit(0);
 }
 
@@ -77,7 +78,11 @@ void init(int xid)
 	case 0:
 		break;
 	default:
-		pause();
+		fprintf(stderr, "Waiting for VM's qrexec agent.");
+		for (;;) {
+			sleep(1);
+			fprintf(stderr, ".");
+		}
 		exit(0);
 	}
 	close(0);