Re: Changelog version from 8.1.2 to 9.3.6

> 8.2, 8.3, and 8.4 are all Major releases of the PostgreSQL product.  For
> most other products it would as if the numbering went from "15, to 16, to
> 17".  The last 8.x release was 8.4 (so, there were 5 major releases that all
> shared the same prefix value of 8) and the 9.x series goes from 9.0 to 9.6
> (presently in beta).  Instead of 9.7 we will be going to 10.0 AND at the
> same time modernizing our numbering scheme to lose the prefix-suffix
> components.  IOW, after 10.0 the next major release will be 11.0.  The .0
> will increment for minor releases in which we only apply bug-fixes.  There
> will no longer be a third number.

Currently are minor upgrades reversible, that is, can we rollback from
9.4.3 to 9.4.2.