[MacPorts] #55332: chown does not support changing group

[MacPorts]

#55332: chown does not support changing group
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 Reporter:  ryandesign  |      Owner:
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  base        |    Version:  2.4.2
 Keywords:              |       Port:
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 The `lchown` C function in src/pextlib1.0/Pextlib.c accepts a file path,
 username, and optional group name.

 But the `chown` Tcl procedure in src/port1.0/portutil.tcl that calls it
 does only accepts a file path and username.

 Should `chown` also accept an optional group name?

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Ticket URL: <https://trac.macports.org/ticket/55332>
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