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.

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

This is avoid having supplementary directories at
SS_SERVICE_ADMDIR or SS_SERVICE_USERDIR mostly in case of crash of
module parse process. In that case, as the resolve file of the module is not
created yet, it cannot be found at remove time.

that is a part of a module

make exclusive -s and -c options.
use new environment function from oblibs.
less HEAP memory usage.

This reverts commit 87bd69c6.

in case of resolve file corruption.
Use of lexer functions.

Some distribution do not leave an empty live directory at exit of the initramfs.
In case of existing directory, the -m option remount the live directory excluding the MS_NOEXEC flag.