wininet useragent implementation

[Vijay Kiran Kamuju]

Hi,

If anyone has enough patience, please look into my wininet useragent patch.
It adds InternetSetOption and InternetQueryOption for
INTERNET_OPTION_USER_AGENT.
It is still not complete, it still has some bugs.
Please fix/improve the implementation and submit it to the wine-patches
I will not be available for a week or more. (a month)
I have submitted some new tests for wininet.

Thanks and Regards,
Vijay