[MacPorts] #52408: Update claws-mail to use webkit2-gtk

[MacPorts]

#52408: Update claws-mail to use webkit2-gtk
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  Reporter:  jeremyhu@…  |      Owner:  perry@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:
      Port:  claws-mail  |
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Comment (by jeremyhu@…):

 That change looks quite scary to me.

 What in the claws-mail build system determines to use webkit2-gtk or
 webkit-gtk if both are installed?  Was the port just broken before this
 change and now this fixes an implicit dependency bug?

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Ticket URL: <https://trac.macports.org/ticket/52408#comment:3>
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