egcs-971016/libstc++/stl/hashtable patch (revised)

[Joe Buck]

>   > We aren't maintaining the STL files; SGI is.  I think we'll have to send
>   > bugs and patches to them, unless we want to fork (do we?).  They've
>   > generally been fairly cooperative.
> We don't want to diverge unless there's a compelling reason.
> 
> I don't know C++ well enough to know if anything Greg sent
> represents anything serious enough to diverge.

At least some of Greg's patches seem to be papering over the flow analysis
problems in exception code (moving return statements out of try blocks
and the like).  The existing code is valid.  So in that sense those
patches wouldn't be needed if the compiler were fixed.

Some of the other patches represent missing forwarding headers (<iostream>
and the like), headers that Ulrich said he was working on but that I
haven't seen yet (does he have a private copy of new work somewhere?).