URGENT - Mainnet validators

Please make sure you have done the previous update. If you haven't please do.

Then update node flags:

1. open /etc/systemd/system/validator.service
2. remove -F 39987437:600844:7 -F 39987437:600845:7 if they are still present
3. add flags -F 39991868:601006:7 --catchain-max-block-delay 0.5 to the end of ExecStart
4. restart validator:

systemctl daemon-reload
systemctl restart validator