In ubuntu 20.04 package, "repmgr standby switchover" seems to have wrong "actions" commands

[dko-slapdash]

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04.3 LTS (Focal Fossa)"

$ repmgr node service --list-actions
Following commands would be executed for each action:

    start: "pg_ctl  -w -D '/var/lib/postgresql/13/main' start"
     stop: "pg_ctl  -D '/var/lib/postgresql/13/main' -W -m fast stop"
  restart: "pg_ctl  -w -D '/var/lib/postgresql/13/main' restart"
   reload: "pg_ctl  -w -D '/var/lib/postgresql/13/main' reload"
  promote: "pg_ctl  -w -D '/var/lib/postgresql/13/main' promote"

In the docs, it's said that for systemd (and thus ubuntu), it's better to use systemctl based commands. But the deb package doesn't set it as default when installing (and pg_ctl doesn't seem to work - no pg_ctl in default PATH).

I think there are 2 options here:

1. In the package for Ubuntu, change the default values for these actions.
2. Pre-create /etc/repmgr.conf with the proper values.