Qbittorrent 4.5.0/4.5.1 users should update to 4.5.2 ASAP

Due to a vulnerability in the WebUI of qBittorrent 4.5.0 and 4.5.1, all users of those versions should update to 4.5.2 as soon as possible.

The flaw was reported:
https://github.com/qbittorrent/qBittorrent/issues/18618

Short version: it allows arbitrary files to be read remotely.

We will be banning 4.5.0 and 4.5.1 as of April 1, or when we detect no one on it for a few days.