Review: prepare plans of embedded sql on function start

Pavel, this patch:

https://commitfest.postgresql.org/action/patch_view?id=624

It applied clean and compiled ok, but I cannot get it to work at all.

$ psql
Timing is on.
psql (9.2devel)
Type "help" for help.

andy=# set plpgsql.prepare_plans to on_start;
ERROR:  unrecognized configuration parameter "plpgsql.prepare_plans"

It was also really upset when I added it to my postgresql.conf file.

I hate to split hairs, but the GUC having option on_start and on_demand seems weird.  Most everything else is a yes/no.
How'd you feel about renaming it to: prepare_plans_on_start = yes/no
 

But really its not start (start might imply you call the function and it starts executing), its on create, so maybe:
prepare_plans_on_create= yes/no
 

-Andy