This patch includes the strcpy and packetdump patches
above. It allows you to use kerberos with either ASCII or PAP
logins. You'll need the appropriate key/srvtab on the machine running
tac_plus. It uses the same principle as login.krb,(in fact much of the
code was taken directly from login.krb in the MIT krb1.0.5
release). This is the version of tac_plus that we are currently
running in production at Stanford.

	It makes some minor changes in the way that the default
authentication configuration works. In addition to adding the keywords
kerberos4 and kerberos5 to the login config line for a user or a
group, you can also add them to the default authentication line. i.e.

	default authentication = kerberos4

- You can use one or the other, but not both as the default authentication.
The K4 code is much more tested that the K5 code.