cubicweb #1953945 don't set cookie expires properly [resolved]

since we moved back from twisted.web2...

So every cookie is considered as a session cookie (causing pb with the remember me feature for instance)

priorityimportant
typebug
done in3.13.6
load0.300
load left0.000
closed by#54283a5b7afc [web request] fix cookie 'expires' formating (closes #1953945)