[MacPorts] #52381: neomutt @20160916_2: chgrp fails during non-root destroot

[MacPorts]

#52381: neomutt @20160916_2: chgrp fails during non-root destroot
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  Reporter:  jhi@…    |      Owner:  leonardo@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.3.4
Resolution:           |   Keywords:
      Port:  neomutt  |
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Comment (by leonardo.schenkel@…):

 I have attached a fix. When not building as root the port will assume you
 don't want to read mail from the system spool at `/var/mail` and it will
 build with `--with-homespool`, which turns off the `dotlock` functionality
 and allows the port to finish building.

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Ticket URL: <https://trac.macports.org/ticket/52381#comment:3>
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