Attached is the latest version of the Big Histogram Patch (tm).
It implements a new table, 'Probability of success of an incoming
request', as well as histograms of successful incoming requests and
of the sizes of the files in the datastore. It forces a datastore reset
at least on my Kaffe,
Attached patch implements the above, phase 1 of GJ's overload fix plan,
and a crude approximation to phase 2 (it just accepts the requests in the
most successful bucket, if it's partly overloaded). In need of
optimization, and rather coarse (only 16 buckets). Not yet thoroughly
tested, due
