Issue #1212 : minimal handling of domains and subdomains in cookies

This should solve issue #1212  in a minimal way. 

The problem is that the actual implementation of `getCookie(String url)` didn't take subdomains into account. If the domain starts with a `'.'` (dot char) then all cookies in this domain and subdomains should be returned.

The fix doesn't intend to provide a proper implementation of subdomain cookie handling but something that works well enough for testing...and for facebook api to be happy while testing.