[feature request] Add support for Panic Button

[aurora-anon]

Read more at here.

There're a couple of reasons for implementing the panic button:

• Downloading torrents is illegal in some countries.
• In the case if a public torrent, it could be something sensitive.
• In the case of a private torrent, it's absolutely containing sensitive data.

Make an option so users can enable/disable the use of the panic button.