[wininet]add implementation of few more options

[Dmitry Timoshkov]

"Vijay Kiran Kamuju" <infyquest at gmail.com> wrote:

> ChangeLog
> ----------------
> Added implementation for INTERNET_OPTION_VERSION
> Added implementation for INTERNET_OPTION_USER_AGENT
> Fixed behavior for INTERNET_OPTION_HTTP_VERSION
> Added implementation for unsupported options

Look like it lacks a test case.

-- 
Dmitry.