run-cosmos: support fleetlock unlocking at reboot #51
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This extends run-cosmos with a new argument that calls the unlock function already included in the script as well as using the already existing lock() function to make sure there is no race between the bootup process and cron starting a normal run-cosmos process at the same time.
The oexit() function is added to support exiting with a OK exit value the same way eexit() is used to signal something is wrong.
This change also adds the systemd unit file that runs run-cosmos with the new fleetlock-unlock argument at boot if fleetlock is configured.
While here fix indentation that was mixed between 3 and 4 spaces: it is now 4 spaces everywhere.