Removal of pre-ISO C++ items from include/backwards

[Gerald Pfeifer]

On Thu, 25 Oct 2007, Andrew Pinski wrote:
> Well technically these headers have been deprecated since at least 3.2
> (maybe even back in 3.0) with them producing a warning.  So I don't
> know if we should move them or not but we have followed our own rules
> here.

Sorry, I misread the Subject: what disappeared under my back, without any 
warning nor deprecation period, actually was ext/hash_map and friends.

Can we get these back, please?

Gerald