[MacPorts] #58048: pcb upgrade to 4.2.0

[MacPorts]

#58048: pcb upgrade to 4.2.0
---------------------------+------------------------
  Reporter:  technobauble  |      Owner:  (none)
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  maintainer
      Port:  pcb           |
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Comment (by mf2k):

 Yes. There is an optional patch phase in Macports. See the
 [https://guide.macports.org/#development.patches guide] about creating
 them. They are stored in the optional, created only as needed, {{{files}}}
 directory. See also https://guide.macports.org/#reference.phases.patch

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Ticket URL: <https://trac.macports.org/ticket/58048#comment:6>
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