Fixes https://github.com/koreader/koreader/issues/5025 The OPDS browser was doing some fancier stuff in a way that should be abstracted away in util (because it applies anywhere files will be saved): eace8d25c1/frontend/ui/widget/opdsbrowser.lua (L482-L491)
eace8d25c1/frontend/ui/widget/opdsbrowser.lua (L482-L491)