[MacPorts] #46956: base should keep track of explicitly requested variants on install and only preserve those on upgrade

[MacPorts]

#46956: base should keep track of explicitly requested variants on install and only
preserve those on upgrade
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  Reporter:  cal@…        |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.3.3
Resolution:               |   Keywords:
      Port:               |
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Comment (by mojca@…):

 I wanted to point out a somewhat related "problem" reported in #51498.

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Ticket URL: <https://trac.macports.org/ticket/46956#comment:5>
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