[MacPorts] #73892: mysql8-server @8.4.8 fails to initialise on macOS High Sierra, Version 10.13.6

[MacPorts]

#73892: mysql8-server @8.4.8 fails to initialise on macOS High Sierra, Version
10.13.6
----------------------------+------------------------
  Reporter:  ballapete      |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.12.4
Resolution:                 |   Keywords:  highsierra
      Port:  mysql8-server  |
----------------------------+------------------------

Comment (by ballapete):

 The described problem only occurs when I am performing the command as
 super-user `root`, while when invoked with `sudo` from my own account it
 succeeds.

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Ticket URL: <https://trac.macports.org/ticket/73892#comment:1>
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