missing header

Additions/nt: Whitespace and svn:keyword cleanups by scm.

VBoxCredProv/testcase: No WINDDK needed or present; No need for special PSDK any more; Fixed build issue.

VBoxCredProv: Rewritten VirtualBox credential provider; now uses proper (optional) guest logging, added auto-logon facility status reporting.

export some files from Additions/WINNT/VBoxCredProv to OSE