Christos implemented statvfs on NetBSD (see his proposal when he was planning the work). I just upgraded to 2.0F and found out that rdist6 (a.k.a. freerdist, whatever you wanna call it) no longer compiles, as it expects to use statfs instead.
I use rdist6 to distribute centrally mastered files around on my systems, so I was too impatient to wait for an “official” fix, so I patched something together in pkgsrc to make rdist6 work again.