[MacPorts] #53029: Upgrade libetpan to 1.7.2

[MacPorts]

#53029: Upgrade libetpan to 1.7.2
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 Reporter:  pmetzger  |      Owner:
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  libetpan
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 libetpan on github is at 1.7.2 -- it should probably be updated as
 Macports is at 1.6

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Ticket URL: <https://trac.macports.org/ticket/53029>
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