[MacPorts] #56020: Finalize and merge gsoc10-configfiles

[MacPorts]

#56020: Finalize and merge gsoc10-configfiles
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  Reporter:  neverpanic   |      Owner:  raimue
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:  MacPorts 2.6.0
 Component:  base         |    Version:
Resolution:               |   Keywords:
      Port:               |
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Description changed by raimue:

Old description:

> Andrea D'Amore wrote some useful code to improve config file handling
> during upgrades in GSoC 2010. We should finish it and merge it.

New description:

 Andrea D'Amore wrote some useful code to improve config file handling
 during upgrades in GSoC 2010, which can be found on the
 [https://github.com/macports/macports-base/tree/gsoc10-configfiles
 gsoc10-configfiles] branch. We should finish it and merge it.

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Ticket URL: <https://trac.macports.org/ticket/56020#comment:1>
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