[MacPorts] #60847: port install subport=xyz doesnt work as expected

[MacPorts]

#60847: port install subport=xyz doesnt work as expected
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  Reporter:  wadjei  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.2
Resolution:          |   Keywords:
      Port:          |
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Comment (by kencu):

 mariadb-10.1 is currently good on 10.9

 <http://packages.macports.org/mariadb-10.1/>

 <https://ports.macports.org/port/mariadb-10.1/summary>

 Every so often I sweep through and fix up the mysql/mariadb ports for
 older systems. Just haven't lately. There is an update to legacysupport in
 the commit tree that I haven't pushed through to a release that we need
 for some this to work.

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Ticket URL: <https://trac.macports.org/ticket/60847#comment:3>
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