[MacPorts] #70763: lftp @4.9.2_5 cannot compile with libressl installed

[MacPorts]

#70763: lftp @4.9.2_5 cannot compile with libressl installed
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  Reporter:  SaintBol  |      Owner:  Schamschula
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.10.1
Resolution:            |   Keywords:
      Port:  lftp      |
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Comment (by Schamschula):

 On my machine I can't replicate this particular error, but I did run into
 the issue from ticket #70750: can't find {{{<cmath>}}}.

 I have a local workaround for that. I just have to figure out how to best
 include it in the Portfile.

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Ticket URL: <https://trac.macports.org/ticket/70763#comment:6>
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