add servicedir entry at live addon. Add enabled at configuration group entry. Move status entry from path to live addon

use tmpfs directory as service directory for the runtime. Deal with logger destination directory at init time

simplify interface of service_is_g and its functionality, provide service_get_treename as replacement

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.

Do not warn the user about this feature. It only used on very specific case like module migration process.
Badly used, this features can easily broke the sanity of the system state

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

add service_resolve_write_tmp and state_write_tmp function to be able to write those files at a temporary directory

Parse the service and write the result in a temporary directory. When the write process
is finished the directory is copied to the original service directory overwritten a
same file. The symlink /var/lib/66/system/.resolve/service/<name> is made at the complete
end of the process. So we can clean the mess removing the temporary directory and
avoid to change the original service directory before the end of the process. The state of
system should be clean event on crash of the parse process

Directories are handled by sanitize_write

Module and bundle should only know about services inside its.
Spawn a new process with its own graph when dealing with module/bundle services.