revisit IE httponly cookie support

http://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx

we need to ensure changing to use new cookie API will not break existing cookie support

existing cookie test: http://nicole1.us.oracle.com:8080/plugin_tests/Cookies/Cookies/html/sop/CookieGetSet.html

in this test, there are actually 3 params for the cookie:

name=value;expiration-date;path=/...

some how the expiration-date and path is causing issues with the new "ex" API.

we need to make sure the test pass on XP, win 7 (run as admin or std)

We might need to do some processing on the args we pass to the ex API; or use different API based on the params.

more research and experiment needed