fixes and updates

sys/apps/shadow/shadow.sysconf

@@ -20,3 +20,7 @@ if [ "$current" != "$last" ] ; then
     done | sed "/^ *$/d" >> /etc/pam.d/system-auth
     date +%s -r /etc/pam.d/system-auth.d/ > /var/lib/ymp/sysconf/shadow/update.date
 fi
+
+if ! ls -la /usr/bin/su | grep "^...s" >/dev/null ; then
+    chmod 4755 /usr/bin/su
+fi