Rtorrent 16 icons: brand
From Rtorrent 16 16.27-12Z (commit 4134bf6e5), https://icons.qnaputilities.com/
Colours that the panel's theme gives are written out for a light background.

Rtorrent 16's own drawings: Rtorrent 16 Freeware Licence 1.0, https://www.qnaputilities.com/LICENSE.txt
