[MacPorts] #51310: ImageMagick: update to 7.x

[MacPorts]

#51310: ImageMagick: update to 7.x
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  Reporter:  mopihopi     |      Owner:  ryandesign
      Type:  update       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  ImageMagick  |
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Comment (by Dave-Allured):

 @josephsacco, I am not able to follow that last link to the ImageMagick
 discussion.  They moved their version 6 forums to a different server and
 changed the URL style.  As a result, old links no longer follow through to
 their designated topic.  There are many topics there.

 Can you please provide a corrected link, or a topic name or search term?
 Thanks.

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Ticket URL: <https://trac.macports.org/ticket/51310#comment:23>
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