[MacPorts] #63409: openssl @1.1.1l: build failure On Mac OS X 10.4.11: rand.h now uses Availability.h instead of AvailabilityMacros.h

[MacPorts]

#63409: openssl @1.1.1l: build failure On Mac OS X 10.4.11: rand.h now uses
Availability.h instead of AvailabilityMacros.h
------------------------+----------------------
  Reporter:  alex-free  |      Owner:  larryv
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.1
Resolution:             |   Keywords:  tiger
      Port:  openssl    |
------------------------+----------------------

Comment (by alex-free):

 Kencu, I think the OpenSSL people may be more understanding then you
 think. I have been building the latest OpenSSL versions (including some
 3.0 alphas) since February of 2020 as part of my PPCMC 7 application which
 targets Mac OS X 10.3.9+. As of OpenSSL 1.1.1k, this built as is without
 any modification besides some configure flags using Xcode 2.5 and no
 macports packages whatsoever (just a newer manually compiled Perl, which
 was compiled with Xcode 2.5 as well). I think a pull request to upstream
 may work, I may do so myself to see what the reaction is.

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Ticket URL: <https://trac.macports.org/ticket/63409#comment:9>
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