[REQUEST] Option to add other trackers

[QuixThe2nd]

In config, there should be the ability to automatically add specific trackers to all torrents.

[Wiilf]

This is a public torrent feature, as the script is designed to serve private torrents. I took care to accept both easily, by modifying how announce/announce-list array key is handled/unset in upload.php & download.php wrapped in a condition that uses ['info']['private'] = 1 : else : continue;