[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 ryandesign@…):

 Replying to [comment:3 ryandesign@…]:
 > and also why this line already exists in the portfile:
 >
 > {{{
 > configure.cflags   "-Os -I${prefix}/include"
 > }}}
 >
 > since both of those values are the defaults.

 Hmm, actually the `-I` flag would be in cppflags by default, not cflags.
 Are we saying rsync's build system erroneously does not understand
 cppflags?

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Ticket URL: <https://trac.macports.org/ticket/44117#comment:5>
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