Daynivo names for the files on the SD card and the command line tool

- daynivo-config.json, daynivo-authorized_keys and daynivo-network-reset
  on the boot partition; errors go to daynivo-config.error.txt.
- daynivo-kiosk-ctl, with voxip-kiosk-ctl as a symlink to it.
- The voxip-* names keep working, so existing SD cards and instructions
  stay valid; when both config files are present the Daynivo one is
  applied last.
- Internal names (services, /etc/voxip-kiosk, user voxip) are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

www/setup.html

@@ -44,7 +44,7 @@
       li.textContent = u;
       list.appendChild(li);
     });
-    document.getElementById("code").textContent = params.get("code") || "zie: sudo voxip-kiosk-ctl setup-code";
+    document.getElementById("code").textContent = params.get("code") || "zie: sudo daynivo-kiosk-ctl setup-code";
   </script>
 </body>
 </html>