Rename pg-primary and pg-standby variables to pg1 and pg2.
Rename pg-primary and pg-standby variables to pg1 and pg2.

It would be better if the hostnames were also pg1 and pg2 to illustrate that primaries and standbys can change hosts, but at this time the configuration ends up being confusing since pg1, pg2, etc. are also used in the option naming.  So, for now leave the names as pg-primary and pg-standby to avoid confusion.

pgbackrest/pgbackrest,pgbackrest/pgbackrest,pgbackrest/pgbackrest,pgmasters/backrest,pgmasters/backrest