advapi32: services: source code reorganization of the Service Control Manager (SCM) and starting implementation of database locking.

Created an attachment (id=7674)
The patch

This patch aims at reorganizing the handling functions of the Service Control Manager into different source files.

Added (new) files:
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lock.c – Procedures for (un)locking the SC database.
service.c – Functions for handling specifically Win32 services.
svcobject.c – Functions for handling "services", i.e. Win32 services or kernel drivers.
utils.c – Helper functions.
unimplemented.c – Contains most of the unimplemented RPC procedures.

Original files:
===============
config.c – The system configuration interface
database.c – Functions managing the Service Controller database.
driver.c – Functions for handling only kernel drivers.
groupdb.c – Functions managing service groups.
rpcserver.c – Contains the RPC management functions (TODO: move the RCloseServiceHandle function to another appropriate file).
services.c – Main program file.

This new architecture will allow better maintenance of the program. It will also be used latter by the author to implement new functions.