What krbafs is
krbafs is a modified version of the KTH Kerberos (eBones) libkafs, with AFS lifetime and afs string_to_key functions pulled in from their libkrb, and made standalone. I believe it uses the second and third arguments to the afs string to key function in the inverse order of the KTH libkrb for compatibility with some old piece of CMU code, but I don't recall.
It builds with configure.
The current version is now maintained offsite. Please visit the MIT OpenAFS page for krbafs page for the most current version.