autovacuum: use case for indenpedent TOAST table autovac settings

Hackers and PG users,

Does anyone see a need for having TOAST tables be individually
configurable for autovacuum?  I've finally come around to looking at
being able to use ALTER TABLE for autovacuum settings, and I'm wondering
if we need to support that case.

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Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.