Thanks, Paul. That was a useful piece of the puzzle, since new LuaSocket is building everywhere else fine (except for failing the reconnect-when-not-reusing-address test consistently). However, the result (also 5.2, XP SP3) seems broken; it cannot do a simple localhost server/client connection reliably, but can do an explicit ip address.
Since XP still has another year before it is dustbinned, and assuming that LuaSocket is actually released this year, we do have to sort this out.
