advapi32: Add more SID tests

[Robert Reif]

Alexandre Julliard wrote:

>Robert Reif <reif at earthlink.net> writes:
>
>  
>
>>Adds more SID tests.
>>Fixes some Windows  failures by checking version first.
>>    
>>
>
>You shouldn't check the Windows version, you should check the features
>themselves.
>
>  
>
ConvertStringSidToSid is supported on NT and later but the particular 
type of two character sid that I am testing is only avaliable on XP and 
later.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/convertstringsidtosid.asp