State of Kerberos v4 support

I'm working over the "kerberos service principal name" patch that's in
the queue to make it good enough for application. During which I noticed
it touches both kerberos 4 and kerberos 5 code, which leads me to two
questions:

1) Does anybody actually use Kerberos v4? Considering it's been declared
dead long ago, is considered insecure, and the latest release my MIT was
sometime back in 1996, and they've declared it officially dead (in
favour of Kerberos v5).

2) It has been deprecated in PostgreSQL since version 7.4. Is it perhaps
time to rip it out?

The main reason I'm asking is that I'm unable to test anything that I do
in that part of the code, so I either need somebody to help me with
that, we rip it, or I code without testing...

//Magnus