libc's authentication privsep layer performed insufficient username
validation. Repair work mostly by markus and millert, first of all
solving the primary problem, then adding some additional validation
points. And then futher validation in login and su.
This will be 6.5/021_libcauth.patch.sig and 6.6/010_libcauth.patch.sig
Reported by Qualys

branches: 1.1.14; 1.1.16;
Wrap <bsd_auth.h> so that calls go direct and the symbols are all weak

Wrap <bsd_auth.h> so that calls go direct and the symbols are all weak