[krbdev.mit.edu #1563] tests fail on alpha/tru64

[Tom Yu via RT]

on rsts-11, with krb5-1.3-current:

    334 Using authentication type KERBEROS_V4; ADAT must follow
    KERBEROS_V4 accepted as authentication type
    ADAT: Kerberos V4 krb_rd_req: Can't decode authenticator (krb_rd_req)
    Kerberos V4 authentication failed
    Name (rsts-11.mit.edu:krbsnap): FAIL: des-v4: ftp authentication

I suspect this is keytab-related, since it appears that the KDC
successfully reads a service ticket in order to issue the rcmd ticket.