wind: Fix help message when unprivileged

wind --user=<NAME> is not supported anymore. We'll setuid() and setgid() to wind:wind on our own.

gui/wind/main.cpp

@@ -73,8 +73,8 @@ Result<int> luna_main(int argc, char** argv)
 
     if (geteuid() != 0)
     {
-        os::eprintln("error: wind must be run as root to initialize resources, run with --user=<USERNAME> to drop "
-                     "privileges afterwards");
+        os::eprintln("error: wind must be run as root to initialize resources, the server will drop "
+                     "privileges automatically afterwards");
         return 1;
     }