This option come from previous behavior. It not the role of enable process
to deal with parse option.
Also, this change allow user to quickly switch between trees without the need
to force a parse process.
The necessary field at resolve file of the service is now handled by enable
process.

add fdholder and oneshotd service at start/stop of scandir. Be able to be session leader at start time for regular user

rename up/down subcommand to start/stop.

sanitize the graph of the system at every service parsing, remove -F option, force to use unsupervise command instead of -u at stop command

complete revamp of the 66-tree tool: interface change, add depends/requiredby and groups features. Allow to create a tree by a seed file