1. "mariabackup --innobackupex" now prints a new warning:
       '--innobackupex' is deprecated and will be removed in a future release

2. "mariabackup --innobackupex" does not print this wrong warning any more:
        --innobackupex: Deprecated program name.
          It will be removed in a future release,
          use '/path/to/mariadb-backup' instead