[MacPorts] #57968: libssh: update to 0.8.6

[MacPorts]

#57968: libssh: update to 0.8.6
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  Reporter:  pmetzger  |      Owner:  neverpanic
      Type:  update    |     Status:  closed
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:  fixed     |   Keywords:
      Port:  libssh    |
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Comment (by pmetzger):

 The update seems to have broken the build of x2goclient. Should I file a
 separate ticket? Error is:

 {{{ ld: library not found for -lssh_threads}}}

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Ticket URL: <https://trac.macports.org/ticket/57968#comment:3>
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