group.  This changes getpw* to always try the shadow db first and
then fall back to the db w/o password hashes.  In the future,
/usr/libexec/auth/login_passwd (and others) will be setgid shadow
instead of setuid root.  OK deraadt@
If you track -current you should do the following:
o add group shadow to /etc/group
o chgrp shadow /etc/spwd.db
o chmod 640 /etc/spwd.db
o rebuild and install src/usr.sbin/pwd_mkdb
You do not need to rebuild libc yet, but it would't hurt to do so.