[MacPorts] #48380: pngcrush: add manpage (was: Missing manpage)

[MacPorts]

#48380: pngcrush: add manpage
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  Reporter:  macports@…   |      Owner:  snc@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.3
Resolution:               |   Keywords:
      Port:  pngcrush     |
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Comment (by ryandesign@…):

 SourceForge suffered a major storage system failure (#48383); they're
 still working on recovering everything, though the web sites and issue
 trackers should be back up by now.

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Ticket URL: <https://trac.macports.org/ticket/48380#comment:4>
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