If an option used on cli is not recognized, the command
aborts and displays an error message.
If the typed option is similar to one of the recognized
options, a hint is displayed.
At the moment, there is a limitation on long options.
Short options are not validated at the moment.
See #2046
* Use openlog before syslog
In order to have a copy on stderr when syslog is not available.
* Take advantage of syslog for actualization
Pipe cron job STDERR and syslog to Docker log
Cf. 00bd467655
* check requirements in actualize_script before executing, fixes#1710
* removed empty whiteline
* testing all requirements
* incorporated code review feedback
* removed code that is already executed in _cli.php
* added newline at eof
* fixed include problems
* fixed include problems
Alexandre Alapetite
Alexis Degrugillier
Kevin Papst
Clément