Re: pgbench stats per script & other stuff

Hello Anders,

This v9 :
  - add "-b list" to show the list of builtins
  - remove the explicit --per-scripts-stats option, which is instead
    automatically set when several scripts are run or with per-command
    latencies (-r)
  - count scripts from 1 instead of 0 in the output

I've left out:
  - removing -N/-S upward compatibility shorthands
    but I will not cry if they are removed
  - requiring percents instead of integer weights, because
    it is too constrained
  - your "array" remark as I did not understood it

Thanks to the restructuring and sharing of stats code, the patch does not 
change the loc count, although a few features are added.

-- 
Fabien.