Re: doc fix for pg_stat_activity.backend_type

On Mon, Nov 12, 2018 at 09:42:45PM +0700, John Naylor wrote:
> Looks like it. A quick search revealed "parallel worker" and "logical
> replication worker". src/test/modules/ also show "test_shm_mq" and
> "worker_spi", but it seems those don't need to be publicly documented.
> If that sounds right I'll update the patch to include the first two.

Just wondering: do we actually need to include in the docs this list at
all?  This is a recipe to forget its update each time a new backend type
is added.
--
Michael