[Exim] Exim 4 planning

I wanted to have another look at Philip's Exim 4 planning documents but found that
the document he published on 16 Jan at

ftp://ftp.csx.cam.ac.uk/pub/software/email/exim/Exim4Plan.html

no longer exist. On going to www.exim.org I was unable to find any links relating
to the Exim 4 planning.

Can anyone point me to the latest state of Philip's planning?

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Phil Chambers (postmaster@???)
University of Exeter