[MacPorts] #42647: Update libupnp to 1.6.19

[MacPorts]

#42647: Update libupnp to 1.6.19
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  Reporter:  ctreleaven@…  |      Owner:  ctreleaven@…
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  haspatch
      Port:  libupnp       |
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Comment (by ctreleaven@…):

 There are bugs in 1.6.19 which constitute a security issue, see:

 https://sourceforge.net/p/pupnp/bugs/122/

 At least one distribution (Mageia) has applied patches as a critical
 security fix:

 https://bugs.mageia.org/show_bug.cgi?id=14143

 Upstream has accepted the fixes but doesn't seem to be moving towards a
 new release.  I'll test applying these as patches to our port.

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Ticket URL: <https://trac.macports.org/ticket/42647#comment:6>
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