unable to log into aggaard

[Matt Crawford]

> | I am unable to log onto aggaard from home.  I am getting a message that
> | reads: "Kerberos login failed.  Clock skew too great", after I enter my
> 
> But - nice error message, isn't it?  Won't that be "preauthentication
> failed" or some interpretation thereof, at most sites? 

Yup.  I made the same change here so users would know which of the
two possibilites it was.

Some users anyway.  We've had three helpdesk tickets from people who
didn't know what "Password has expired" meant.