message: enable BBR on new DigitalOcean droplets
diff: @@ -131,6 +131,17 @@ Unattended-Upgrade::Automatic-Reboot "true";
  EOF
  fi
  +# Enable BBR.
  +# Recent DigitalOcean one-click images are based on Ubuntu 18 and have kernel 4.15+.
  +log_for_sentry "Enabling BBR"
  +cat >> /etc/sysctl.conf << EOF
  +
  +# Added by Outline.
  +net.core.default_qdisc=fq
  +net.ipv4.tcp_congestion_control=bbr
  +EOF
  +sysctl -p
  +
  log_for_sentry "Getting SB_PUBLIC_IP"
  export SB_PUBLIC_IP=$(cloud::public_ip)
  