advapi32: Implement IsTokenRestricted

[Thomas Weidenmueller]

James Hawkins wrote:
> I'm not exactly sure whether the LPVOID param of
> NtQueryInformationToken should be a BOOLEAN value or a DWORD like
> NumRestrictedSids (it isn't documented), but because we just want to
> know whether there exists at least one, the BOOLEAN does the trick
> until we know how to handle TokenRestrictedSids.

TokenRestrictedSids basically returns a TOKEN_GROUPS structure, the
first member GroupCount indicates the number of restricted SIDs.

Here's how i'd implement it:
http://svn.reactos.com/viewcvs/trunk/reactos/lib/advapi32/token/token.c?rev=15958&r1=15169&r2=15958&diff_format=h

Best Regards,
Thomas