While researching a pgsql-general question, I noticed that commit
73c986adde5d73a5e2555da9b5c8facedb146dcd added several new fields
to pg_control without bothering to touch PG_CONTROL_VERSION.  Thus,
PG_CONTROL_VERSION is still "942" even though the file contents
are not at all compatible with 9.4.

It's way too late to do anything about this in 9.5.  I wonder though
if we should advance PG_CONTROL_VERSION now, presumably to "960",
so that at least as of 9.6 the format is correctly distinguished
from the 9.4-era format.  Or will that just make things even more
confusing, given that 9.5 is what it is?

                        regards, tom lane


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