[MacPorts] #38638: update to mosh-1.2.4

[MacPorts]

#38638: update to mosh-1.2.4
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  Reporter:  tpyro@…  |      Owner:  macports-tickets@…
      Type:  update   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.1.3
Resolution:           |   Keywords:  haspatch
      Port:  mosh     |
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Comment (by tpyro@…):

 I can see [https://github.com/downloads/keithw/mosh/mosh-1.2.3.tar.gz
 1.2.3 at the old URL] but not
 [https://github.com/downloads/keithw/mosh/mosh-1.2.4.tar.gz 1.2.4]. The
 address provided in the diff was from this
 [http://mailman.mit.edu/pipermail/mosh-users/2013-March/000167.html
 mailing list announcement]. Posted by a user just trying to make it work;
 no further meaning intended.

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Ticket URL: <https://trac.macports.org/ticket/38638#comment:2>
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