[MacPorts] #54286: Keychain integration no longer works after upgrading to macOS Sierra

[MacPorts]

#54286: Keychain integration no longer works after upgrading to macOS Sierra
-------------------------+---------------------
 Reporter:  Feuermurmel  |      Owner:
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.4.1
 Keywords:               |       Port:  openssh
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 Some time ago, I upgraded by Mac to macOS Sierra (now on 10.12.5). Since
 then, openssh's integration with the keychain no longer works.

 When I connect to a host using a specific key for the first time, I'm
 getting dialog (see screen shot) asking me to enter the password used to
 decrypt the private key. There, I check //Remember password in my
 keychain//. The password is saved to the keychain but after a reboot, the
 same dialog pops up again when trying to connect to a host.

 {{{#!sh
 $ port version
 Version: 2.4.1
 $ port installed and openssh
 The following ports are currently installed:
   openssh @7.3p1_0+gsskex+kerberos5+xauth (active)
 $ grep -iF key .ssh/config
 VisualHostKey yes
 AddKeysToAgent yes
 HostKeyAlgorithms ssh-ed25519,ssh-rsa,ecdsa-sha2-nistp256
 UpdateHostKeys yes
 }}}

 Please tell me if there is additional information I can provide to help
 debug this problem.

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Ticket URL: <https://trac.macports.org/ticket/54286>
MacPorts <https://www.macports.org/>
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