custom container code now obsolete for setup sources

[Nicholas Wourms]

Robert Collins wrote:

>I've removed all references to the custom container list.h in HEAD. It's now
>STL all the way. There are some minor design regressions for the moment,
>until I find a new balance with some of the differences the STL brings, but
>nothing that affects users (AFAICT).
>
I assume these regressions are the cause for HEAD setup not displaying 
updated, non-test versions of releases, instead only marking them as "Keep"?

Cheers,
Nicholas