security_definer_search_path GUC

Hi,

Since writing SECURITY DEFINER functions securely requires annoying incantations[1], wouldn't it be nice if we provided a way for the superuser to override the default search path via a GUC in postgresql.conf?  That way you can set search_path if you want to override the default, but if you leave it out you're not vulnerable, assuming security_definer_search_path only contains secure schemas.

.m