Added a patch to make it compile on NetBSD 3.1 (no pf+ALTQ). (No changelog found)
NetBSD 2 + pflkm, because the path was substituted by "__nonexistent__". So to fix this properly, add a patch with CPP conditional which fixes the path for __DragonFly__.
Pfstat is a small utility that collects statistics for the OpenBSD Packer Filter and produces graphs like mrtg, rrdtool or alike.