Update & Fix torrent creation

[celeroncool]

Hello!

I saw that the torrent creation script wanted some love :)

Modifications:

• Make script use default transmission download directory so it works out of the box.
• Make script fix default transmission systemd init file per transmission-daemon fails to notify systemd of correct start transmission/transmission#6991
• Do not download the VM file if it already exists to save bandwidth.

Open questions:

• At its current stage, the script has no idea if the source files have been updated -> torrent will eventually be out of date.
• Would it be at all possible to have a SHA256 stamp available for download from your server, so we can first hash the local file, compare against your file and download new version?
• Naming the file always NextcloudVM.zip causes other issue, with the torrent naming & distribution. As the torrent file is created, there is no way to update the file later. Would it be better to name the torrent to include what version of Nextcloud VM it is and also what platform it is?

Related Issue

#1819

PS: I will seed this file for the foreseeable future :)

[celeroncool]

I changed this to a draft so I can also finalize updating the trackers.txt file, as it has multiple offline trackers.
Would it be OK to use: https://github.com/ngosang/trackerslist/blob/master/trackers_best.txt

[celeroncool]

I updated the tracker list & tested working with new tracker list:

I can't attach the torrent file here, so here is a link from my own nextcloud instance: https://nextcloud.nenimein.fi/s/j6ytj6BPqWzaPnf/download

[enoch85]

Thanks a lot @celeroncool! I will merge this either way. We can work on improvments if needed in another PR. :)