sshd gives up too soon

[terrillmoore]

If the Conduit is in its initial state, it can be hard to log in.

• the conduit has a default password and no ssh authorized_keys
• the user has a lot of keys loaded via ssh add
• ssh and sshd exchange the loaded keys before going to pasword auth
• but sshd is configured to only try three times

The result is that sshd fails due to testing loaded keys before it drops to password auth.

The workaround is ssh-add -D, which deletes all loaded keys. But this will be confusing and awkward for our users.