[MacPorts] #63859: stunnel @5.60_1 will not build on Monterey 12.0.1 x86_64

[MacPorts]

#63859: stunnel @5.60_1 will not build on Monterey 12.0.1 x86_64
----------------------+----------------------
  Reporter:  breiter  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.1
Resolution:           |   Keywords:  monterey
      Port:  stunnel  |
----------------------+----------------------

Comment (by breiter):

 I have stunnel @5.6.0_0 installed and I literally cannot see anything
 different in the Portfile other than the revision number from 0 to 1.

 I don't really understand what changed.

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Ticket URL: <https://trac.macports.org/ticket/63859#comment:1>
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