illumos gate

It seems like we should be able to remove spray, rstatd and such safely (rstatd is not the NFS statd, but system status information for rup and such (which is not ruptime)).

I think spray, at least, has no reason to exist, given -- as it explicitly says -- it's not even a good benchmark. rstatd has little purpose in the modern world, and many better alternatives. The pieces remaining in illumos are just a dingy corner that people forget exists.