[boost] [utility] Moving addressof out of Boost.Utility

I was informed the eventual plan is to get rid of Utility as a sub-module, and I observed that Assert was moved out already. If there's any interest in (and no objection to) moving boost::addressof out of it, I don't mind making that change. What would be the most appropriate home for it? A Boost.AddressOf sub-module similar to Boost.Assert? Glen