Patch for default Kerbers realm in AIX

[Scott Neugroschl]

> Interesting. If there are no gotchas I'm sure this is desirable for
> OpenSSH, but I know very little about krb5 so I can't say.
> 
> miguel.sanders at arcelormittal.com wrote:
> > Since this is rather new for me, I don't know what the procedure is
> > to supply a patch for this. Any pointers?
> 
> Simply send a patch to the mailing list for review and inclusion.
> Please make sure to check out the latest available sources from CVS
> and work out the patch from there.
> 

I believe Simon Wilkinson reads this list, and he'd be a good person to
review it.