Patch to add parameters' value to a function

Hi all,

Here is another patch to support this new PostgreSQL 8.3 feature : the
possibility to set/reset parameter value from a function (ALTER FUNCTION
x SET y=z ; ALTER FUNCTION x RESET y).

Once again, this patch would love to be on Dave's "shiny new unapplied
patches folder"  :)

Regards.


--
Guillaume.
 http://www.postgresqlfr.org
 http://dalibo.com