[OpenAFS] overide 8 char userids?

[Jim Rees]

  On most (if not all) Unix systems, the field ut_user in "struct utmp"
  (commonly defined in <utmp.h>) is set to 8 characters.

Certainly not all.  All the ones I checked, including OpenBSD and Redhat,
use 32.

  The "rwhod" and
  "rusersd" protocols have 8 characters baked into the wire protocol
  (used by programs such as ruptime, rwho, rusers).

Those are obsolete protocols.  No one should be using them, certainly not
anyone who has afs.

  Tar and cpio (may) know about loginids as opposed to uid; if so,
  there's an 8 character limit there.

No, it's 32 again.  The 8 character limit is on the textual representation
of uid, so that's limited to 99999999.