OpenSSH ssh-agent support for windows

[8uurg]

Is your feature request related to a problem? Please describe.
Managing SSH hosts, their configuration, including keys, are usually done through .ssh/config. Recent versions of Windows (10+) come with a OpenSSH installation, including the ssh-agent. The configuration & keys loaded by the SSH agent do not seem to work:

• CyberDuck is unable to resolve hostnames listed in the .ssh/config file.
• Based on the documentation, ssh-agent is only supported on Linux (and Mac?)

Describe the solution you'd like
Currently Cyberduck (and Mountain Duck) seem to only support PuTTY & PageAnt, OpenSSH support on Windows would be much appreciated.

Describe alternatives you've considered

• Falling back to using PuTTY & PageAnt, requires me to maintain multiple programs for the same task.

Additional context
Add any other context or screenshots about the feature request here.

[dkocher]

I can confirm that currently running on Windows, only SSH authentication agent for PuTTY is enabled.

[AliveDevil]

Technical for why it hasn't been implemented yet: #12882 (comment)

Basically: Our agent proxy dependency is ancient (8 years old, and abandoned) with no support for the Windows OpenSSH named-pipe hackery around the Unix-domain sockets.