Added support for ?destination=... so that login or logout will return to previous visited page.
Revisited the sending of generic response such as access denied, unauthorized, redirection ...
Fixed support of CMS_RESPONSE.header which was previously ignored.
Added support for CMS_RESPONSE.redirection: detachable READABLE_STRING_8, to allow easy url redirection.
Added CMS_NODE.make_empty
+ Cosmetic.