[MacPorts] #43738: gnuplot: upgrade to 5.0

[MacPorts]

#43738: gnuplot: upgrade to 5.0
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  Reporter:  mojca@…  |      Owner:  mojca@…
      Type:  update   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:  haspatch
      Port:  gnuplot  |
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Comment (by mojca@…):

 Replying to [comment:7 devans@…]:
 > Dependency issue:
 >
 > gnuplot will optionally build with libcerf support if that port is
 installed.  Probably should add this as a dependency or explicitly disable
 this feature (don't see an obvious configure option to do this though).

 Weird. Because I was the creating a port for libcerf and I was complaining
 to gnuplot developers that they need to add better support for searching
 for libcerf to `configure.in`. And I forgot to add dependency. The
 dependency is totally optional (I don't know what it's used for), it's
 small (the compressed binary package is 54K) and has no further
 dependencies on its own. So maybe I should just include it
 unconditionally.

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Ticket URL: <https://trac.macports.org/ticket/43738#comment:10>
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