[enh] google engine : avoid some "sorry google" by adding another cookie :...

[enh] google engine : avoid some "sorry google" by adding another cookie : NID. This cookie is specific by hostname.
This allow to send request to google.* (according to the search language).
Before this commit, request in other languages than english was sent to www.google.com which was redirected to www.google.*
The PREF is still use on the www.google.com domain.