Add forum syndication feeds

[sjehuda]

This is not related to #56 .

Please add autodiscovery of forums syndication feeds:

<link rel="alternate" type="application/atom+xml" title="qBittorrent official forums" href="https://forum.qbittorrent.org/app.php/feed" />

There are also:

• qBittorrent official forums (Topics)
• qBittorrent official forums (Linux)
• qBittorrent official forums (Docker)
• qBittorrent official forums (Generic)
• qBittorrent official forums (Suggestions)