OrangePi3 LTS can reboot without hassle at this commit. At the previous tag `bootable-opi3lts`, rebooting from a booted system is problematic: issuing a `reboot` or `systemctl reboot` or `shutdown -r now` or `echo b >/proc/sysrq-trigger` will cause the next boot hang at message "Starting kernel ...". Some searching showed that it could be caused by U-Boot not properly resetting the CPUs, since directly calling `reset` in U-Boot also hangs at the same message. The hanging no longer happens after using a U-Boot blob extracted from the currently latest officially released Debian server image for OrangePi3.