These directories is used to properly define environment variable
at start of a scandir

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

clean of string from frontend key for module.
fix value of intree key.
allow sufficient space for rename of interdependences.
fix use of parse_list functions even in case of multiple line.

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.

It use now the new lexer and environ_xxx functions
from oblibs. The result is a shorter code, using less HEAP memory,
with a faster algorithm and easier to debug.

Reduce use of HEAP memory with
the stack_xxx functions familly.
Switch to the new lexer algorithm.
Fix the parse of the @runas key.

to internal version_compare and version_store respectively.