Documentation of configuration settings

Now that we have the Grand Unified Configuration system we still need to
get rid of the Greatly Sprinkled Documentation thereof. Therefore my plan
for your approval:

* Make SET TRANSACTION and SET CONSTRAINTS each separate reference pages,
as their behaviour is really quite different.

* Make a comprehensive list of everything you can set and how somewhere in
the administrator guide.

* Remove the (then redundant) list of parameters from the SET reference
page and replace it with something to the effect of "This command lets you
set run-time parameters, a complete list of which can be found
."

Comments?

-- 
Peter Eisentraut                  Sernanders väg 10:115
peter_e@gmx.net                   75262 Uppsala
http://yi.org/peter-e/            Sweden