How can I use lib/rpc in MIT kerberos?

[Hua Huang]

Hello Krbdev,

I am developing an user space rpc program.
I found that, in kerberos, "src/lib/rpc" is an ONC RPC extension with
Kerberos authentication.
In src/lib/rpc/unit-test/, there is a unit test program, which is also an
example of how to use this lib.
My questions are:
Where can I find documentation/manual/example of this gssrpc?
Are there any open source project using this gssprc?

according to this post,
http://mailman.mit.edu/pipermail/kerberos/2002-August/001553.html
it seems that this library should not be used.
Is it still true?

Best Regards,
Hua