[MacPorts] #63737: rsync-hfscomp: cleanup: review/fix implicit function declarations; note lack of upstream security updates

[MacPorts]

#63737: rsync-hfscomp: cleanup: review/fix implicit function declarations; note
lack of upstream security updates
---------------------+---------------------------
 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.7.1
 Keywords:           |       Port:  rsync-hfscomp
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 Minor cleanup items for this port, in the spirit of tidiness:
 * Review/fix implicit function declarations;
 * Amend notes to call out lack of upstream security updates

 While the goal is to ultimately retire this port, in favor of patching the
 latest upstream release with the same functionality - tracked by
 issue:60792 - that will require a LOT of careful work. Including detailed
 review with both our folks, as well as upstream, before release. Ditto for
 pre-release testing, as it's critical that we don't break such an
 important piece of software. (Data loss due to buggy patches, is something
 we want to avoid at all costs.)

 Nonetheless, for the near term, take care of cleanup items for this port.

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Ticket URL: <https://trac.macports.org/ticket/63737>
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