Changed files:
su.pamd -> 1.6
#%PAM-1.0
-auth required /lib/security/pam_unix.so
-auth required /lib/security/pam_wheel.so group=wheel
auth sufficient /lib/security/pam_rootok.so
+auth required /lib/security/pam_wheel.so group=wheel
+auth required /lib/security/pam_unix.so
account required /lib/security/pam_unix.so
password required /lib/security/pam_cracklib.so difok=2 minlen=8 dcredit=2 ocredit=2 retry=3
password required /lib/security/pam_unix.so md5 shadow use_authtok