[MacPorts] #59397: openssh @8.1_1: fails to build on 10.6: audit-bsm.c:66:10: fatal error: 'bsm/audit_session.h' file not found

[MacPorts]

#59397: openssh @8.1_1: fails to build on 10.6: audit-bsm.c:66:10: fatal error:
'bsm/audit_session.h' file not found
-------------------------+----------------------------------------
  Reporter:  grumpybozo  |      Owner:  Ionic
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.6.1
Resolution:  fixed       |   Keywords:  snowleopard lion legacy-os
      Port:  openssh     |
-------------------------+----------------------------------------

Comment (by iEFdev):

 Progress. :) That last one with `itemAttributes` is gone, but the 3 `@YES`
 are still erroring out.

 Both
 [https://developer.apple.com/documentation/security/ksecreturnattributes
 ksecreturnattributes] and ksecreturnref says `CFString`, so `@"YES"`? But
 also, [https://developer.apple.com/documentation/corefoundation/cfstring
 CFString] (itself) says 10.10+, so maybe thats what's missing?

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Ticket URL: <https://trac.macports.org/ticket/59397#comment:30>
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