SSH error messages (bug id=234793) ) RELENG_12

[mike tancsa]

Does anyone know what the cause is of this fail message ?

(https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234793)

its triggered by a normal ssh key'd login, but sshd is running with
VERBOSE logging. 

 sshd[63290]: Failed unknown for testuser1 from 192.168.xx.yyy port
60643 ssh2 ?

The user is able to login no problem, but the error message is bubbling
up in our HIDS. We had to white list it, but it would be useful to
understand exactly why and what is failing.

    ---Mike