[developers] a late follow-up from lisboa

[Ann Copestake]

I would be happy if the others want to copy some of the messages to
developers, but I think it would be much more useful if a summary is
produced after their meeting in Saarbruecken.

> > [...] a detailed discussion has been going on about this between Ben,
> > Uli S and Bernd.
> 
> i would not mind copying such discussion to `developers'.  some of the
> documentation i had suggested (on relative merits) may emerge from our
> shared archives at some point.