[MacPorts] #47505: stunnel @5.15_0: update to 5.16

[MacPorts]

#47505: stunnel @5.15_0: update to 5.16
---------------------------------+--------------------------------
 Reporter:  mschamschula@…       |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.3
 Keywords:  haspatch maintainer  |       Port:  stunnel
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 stunnel has been updated to version 5.16:
 {{{
 This release only fixes a compilation issue with old versions of gcc.
 }}}
 We can remove the ad hoc patches for OS X 10.5 and 10.6 to work around
 this problem.

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Ticket URL: <https://trac.macports.org/ticket/47505>
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