[MacPorts] #54873: geoipupdate won't build on Snow Leopard due to missing strnlen()

[MacPorts]

#54873: geoipupdate won't build on Snow Leopard due to missing strnlen()
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  Reporter:  grumpybozo   |      Owner:
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.4.1
Resolution:               |   Keywords:  haspatch snowleopard
      Port:  geoipupdate  |
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Changes (by grumpybozo):

 * Attachment "geoipupdate.patch" added.

 Portfile patch

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Ticket URL: <https://trac.macports.org/ticket/54873>
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