setupapi: Implement SetupOpenLog(), SetupLogErrorA(), SetupLogErrorW(), SetupCloseLog()

[Pierre Schweitzer]

Dear all,

Please find attached a patch that implements the functions
SetupOpenLog(), SetupLogErrorA(), SetupLogErrorW() and SetupCloseLog()
in setupapi.dll. It comes with a few tests to highlight corners cases
(and errors) of the functions.
This was designed and tested on Windows 2003 server (even though it's
been available starting Windows 2000).

Also, there are some behavior I implemented that I failed at designing a
test for: (null) on NULL string, written to setupact.log whatever the
severity level even if wrong. If anyone has ideas about how to do it
properly, just shoot.

Here, with such an implementation, the 12 tests are passing.

With my best regards,
-- 
Pierre Schweitzer <pierre at reactos.org>
System & Network Administrator
Senior Kernel Developer
ReactOS Deutschland e.V.
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