xwayland: improve startup log message

Logging the raw Xwayland command-line was incomplete, uninformative
and confusing for end-users. Instead, print a proper message in
English.

xwayland/server.c

@@ -96,9 +96,7 @@ noreturn static void exec_xwayland(struct wlr_xwayland_server *server) {
 	snprintf(wayland_socket_str, sizeof(wayland_socket_str), "%d", server->wl_fd[1]);
 	setenv("WAYLAND_SOCKET", wayland_socket_str, true);
 
-	wlr_log(WLR_INFO, "WAYLAND_SOCKET=%d Xwayland :%d -rootless -terminate -core -listenfd %d -listenfd %d -wm %d",
-		server->wl_fd[1], server->display, server->x_fd[0],
-		server->x_fd[1], server->wm_fd[1]);
+	wlr_log(WLR_INFO, "Starting Xwayland on :%d", server->display);
 
 	// Closes stdout/stderr depending on log verbosity
 	enum wlr_log_importance verbosity = wlr_log_get_verbosity();