New libc malloc patch

[Claus Guttesen]

> There is a patch that contains a new libc malloc implementation at:
>
> http://www.canonware.com/~jasone/jemalloc/jemalloc_20051127a.diff
>
> This implementation is very different from the current libc malloc.
> Probably the most important difference is that this one is designed
> with threads and SMP in mind.

Do you need current for this? I patched and tried buildworld on 6.0
stable but no go.

regards
Claus