[MacPorts] #39784: Doxygen @1.8.3.1: update to 1.8.4

[MacPorts]

#39784: Doxygen @1.8.3.1: update to 1.8.4
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  Reporter:  egall@…  |      Owner:  css@…
      Type:  update   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  doxygen  |
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Changes (by css@…):

 * status:  new => assigned


Comment:

 I'll check on first getting the update and then adding the variant for
 clang support.

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Ticket URL: <https://trac.macports.org/ticket/39784#comment:6>
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