Documentation updates (sql_counter with postgresql)

[Nicolas Baradakis]

Stephen Gran wrote:

> After making this work for myself, I thought I would send the
> documentation on so that others could do it more easily.  There are some
> duplicates that could be cut, but I leave that to you to decide.  I have
> tried to be clear without being completely repetitive.  Hopefully others
> will find it useful.

Sorry, I can't apply the patch as it is: it seems your editor (or your
mail client) has replaced tabs with spaces.

-- 
Nicolas Baradakis