This was committed back in February, in r744095, and r744552. It added a poll() based backend for pollcb.
The problem is that this backend is not thread safe, while all of the others are -- and it was my intention that by default all backends are thread safe, which is a departure from the previous pollset API. I believe that it should return ENOTIMPL until such a time that it could be made thread safe (ie, add or remove while a _poll() is going on). Thoughts? Thanks, Paul
