Add a UCP option to disable the qBittorrent public torrent script

Description:

I recently received excellent support from the Ultra.cc team regarding an issue with qBittorrent.

The root cause was the public torrent script (pubscript), which was incorrectly identifying torrents from the French private tracker C411 as public torrents because it could not correctly process the tracker messages.

As a result:

• completed torrents were automatically paused;

• a per-torrent upload limit of 488 KiB/s was applied;

• newly uploaded torrents were not always seen as seeded by the tracker.

The support team explained the issue and the solution was simply:

app-qbittorrent restart --remove-pubscript

After running this command, all issues disappeared.

Suggestion

It would be much easier if users could simply enable or disable the public torrent script from the UCP (or qBittorrent management page) instead of having to connect through SSH.

Alternatively, the script could automatically ignore known private trackers or correctly handle tracker messages in languages other than English.

This would greatly improve the experience for users who are not familiar with Linux or SSH, while still keeping the current behaviour available for users who actually need the public torrent protection.

Thank you again for the excellent support and for quickly identifying the root cause.