[MacPorts] #67730: libproxy: update to 0.5.3 (was: libproxy not updated for 9 months: any reason for that?)

[MacPorts]

#67730: libproxy: update to 0.5.3
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  Reporter:  barracuda156  |      Owner:  dbevans
      Type:  update        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  libproxy      |
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Ticket URL: <https://trac.macports.org/ticket/67730#comment:1>
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