[MacPorts] #40776: unrar: update to 5.0

[MacPorts]

#40776: unrar: update to 5.0
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  Reporter:  vergus@…  |      Owner:  macports-tickets@…
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.2.0
Resolution:            |   Keywords:
      Port:  unrar     |
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Comment (by vergus@…):

 Replying to [comment:1 egall@…]:
 > Looks like this breaks compatibility with older versions, we might want
 to keep the older version around just in case...

 What specifically breaks compatibility? The only thing I saw was the new
 archiving format, but since this library ONLY unrars, there is no problem
 since it will handle both the newer and older archive formats.

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Ticket URL: <https://trac.macports.org/ticket/40776#comment:3>
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