tune_new_system.sh: add tuning for IPv6 tempaddr (eterbug #14600)

etersoft/tune_new_system.sh

@@ -131,4 +131,12 @@ if [ -f /etc/net/ifaces/e*/options ] ; then
     subst "s|^NM_CONTROLLED=yes|NM_CONTROLLED=no|" /etc/net/ifaces/e*/options
     subst "s|^DISABLED=yes|DISABLED=no|" /etc/net/ifaces/e*/options
 fi
+
+if [ ! -f /etc/sysctl.d/40-tempaddr-ipv6.conf ] ; then
+cat <<EOF > /etc/sysctl.d/40-tempaddr-ipv6.conf
+# Enable IPv6 Privacy Extensions
+# see https://bugs.etersoft.ru/show_bug.cgi?id=14600#c5
+net.ipv6.conf.all.use_tempaddr = 2
+net.ipv6.conf.default.use_tempaddr = 2
+EOF
 fi