Prevent pg_basebackup running as root

When Who What
2020-02-27 09:39:41 Peter Eisentraut (petere) Closed in commitfest 2020-03 with status: Rejected
2020-02-07 04:00:49 Michael Paquier (michael-kun) Removed michael-kun from committers
2020-02-07 04:00:12 Michael Paquier (michael-kun) New status: Waiting on Author
2020-02-01 09:35:20 Michael Paquier (michael-kun) Closed in commitfest 2020-03 with status: Committed
2020-02-01 09:35:20 Michael Paquier (michael-kun) Changed committer to michael-kun
2020-01-30 05:34:25 Ian Barwick (barwick) Changed authors to Ian Barwick (barwick)
2020-01-30 05:34:25 Ian Barwick (barwick) Changed targetversion to 13
2020-01-30 05:34:03 Ian Barwick (barwick) Attached mail thread CABvVfJVqOdD2neLkYdygdOHvbWz_5K_iWiqY+psMfA=FeAa3qQ@mail.gmail.com
2020-01-30 05:34:02 Ian Barwick (barwick) Created patch record