As it is documented in keyformat.txt, we should support "Use-for-ssh" flag, so that we won't need a line in sshcontrol.
Revisions and Commits
|rGd86b6c28fcca agent,ssh: Support "Use-for-ssh" flag in private key.
|rGef3e5fd40377 agent: Factor out handling scanning over ssh keys.
This is an experimental patch to support "Use-for-ssh":
I'm afraid that how to define clear semantics of "Use-for-ssh".
When it's a key of OPENPGP.3 on card, which naturally expresses it's a key for SSH, having this flag means that adding meaning of "it will prompt you when your card/token is not inserted".
Related to T5987.