Postgres 8.1.x and MIT Kerberos 5

Greetings,
I was trying to build source build postgres 8.1.x with MIT Kerberos 5 1.4.x
implementation.
The whole thing bombs out. After some digging, I had to hack the autoconf
script (configure.in)
to properly account for the way the libraries are built for 1.4.x. I don't
know whether an earlier
post had the same issue. I think it boils down to adding the
'libkrb5support' when all the krb5
libs are checked in the configure script.

On another note, is the kerberos authentication secure, I had searched some
old threads,
where it was indicated the principal is not checked by the db as a valid
user. Is this still
the case?

Thanks a lot.

Mohan