[MacPorts] #44117: rsync: update to 3.1.1

[MacPorts]

#44117: rsync: update to 3.1.1
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  Reporter:  jimjag@…  |      Owner:  macports-tickets@…
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  haspatch maintainer
      Port:  rsync     |
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Comment (by jimjag@…):

 The cflags line is not new but the ldflags line is. The latter is due to
 changes from 3.1.0+

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Ticket URL: <https://trac.macports.org/ticket/44117#comment:7>
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