4 years later and still no reply..., question remains relevant... libtorrent now at 1.1.0... [BUMP] There is an option in the ltconfig plugin that can enable this. There is no default option in deluge itself. The option is labeled as strict_super_seeding. Thank you for this helpful information!

4 years later and still no reply..., question remains relevant... libtorrent now at 1.1.0... [BUMP]