Joerg Sonnenberger wrote me to describe the preferred bug reporting path for pkgsrc issues on DragonFly:
1: Mail Joerg Sonnenberger or email@example.com
2: Mail DragonFly developers known to work on pkgsrc
3: send-pr, on the NetBSD site. (The first page I found for that looks to be focused on NetBSD…)
4: Mail to the firstname.lastname@example.org mailing list.