Rename TimeoutKill to TimeoutStart.
Rename TimeoutFinish to TimeoutStop.
Remove TimeoutUp and TimeoutDown key.
To avoid confusion and mistake, oneshot and classic service use now
the same key name to declare the timeout to use.
TimeoutStart and TimeoutStop are clearer than TimeoutKill and TimeoutFinish.
66 is sufficiently smart to name the file correctly for s6-supervise
whick look for the timeout-kill and timeout-finish file.

Key name now begin with a capital letters instead of using the '@' character.
Also, '-' character are removed from  a composite name.
This is introduce the very first change of the key field.
Some simplications and changes to the key name will be made.
Add the  get_enum_list() function.

The status command without options return now an overview of all services
from all trees. This is similar as 66 tree status command but with a
shorter call and less informations.

Fix redirection to get sulogin message.
Handles environment properly before managing init configuration file.

Each tool needs to be independent, which
meant that every time a tool was called,
it would build the entire system graph.
This was an obvious waste of time and resources.

Now, the tools build the graph based
on the requested services, which
drastically reduces the time needed to
construct the necessary dependency graph.

This program is executed via the run script in the service's live directory. It sits between s6-supervise and the user's executable script, allowing for the preparation of the user's script execution. This introduces a dual capability:

    Define certain preparations through frontend keys, such as setting ownership, moving to a working directory, limiting resources used by the service, etc.
    Since 66-execute runs on each signal received and transmitted by s6-supervise, it is now possible to send messages to an event management daemon.

By default, this program performs previously defined actions such as logging redirections and managing environment variables (previously handled by excel-envfile), creation of the log destination directory, and so on.So, the user's file now contains only the exact copy of the @execute field.
Also, the name of the script for an start or
stop process are the same. This was a old behabvior
coming from s6-rc  manager.

Provide more explanation of environment behavior and new scandir behavior

Logger destination directory for a service
inside a module was not deleted.

Sending signal to the fdholder socket at each loop is really a bad design.

This process handle a service selection from a same live directory.As any contents of the field fdholderdir will be valid,
a simple call at the end of process will do the needs.

an already unsupervised service.

This is the unsupervise process, at worse the service isn't supervised.

Permit to set uid and gid for a run script.
Unknown key may occur at end of the file.
Avoid to changed pointer.
Typo fix.

Splitting through a wrapper the main parse_section
allow to be flexible in case of specific needs for a section.
It also easier to add another section.

This is a necessary review for new coming section.
Each table are now used separately.
More lignes of code but a shorter execution and a
easier manner to deal with API to integrate new section.