Added CMS_API.request: WSF_REQUEST to ease dev of ROC CMS code.

- Removed CMS_REQUEST_UTIL
  - centralize a few request related code into CMS_API
Added CMS_API.user, CMS_API.set_user (CMS_USER), ... and user related routines.

Refactored Auth related code
  - added various abstractions to factorize implementation and harmonize solutions.
  - revisited the logout strategy.
  - updated the account info page, and remove info user should not care about.
  - simplified the process, and encourage auth module to follow same design.

Added CMS_LINK helper routines to modify the related query string.
Removed CMS_USER.profile (and related routines)
   - It was not used so far.
   - it will probably a specific module later, if needed.

Update various module to avoid fetching user from sql directly, and let this task to CMS_USER_API.

Removed CMS_NODE_API.node_author (a_node: CMS_NODE): detachable CMS_USER,
   - as the info is already in CMS_NODE.author

Added CMS_RESPONSE.redirection_delay, if ever one code want to redirect after a few seconds.
Added the request uri info to the not found cms response.

modules/basic_auth/handler/cms_basic_auth_login_handler.e

@@ -49,9 +49,9 @@ feature -- HTTP Methods
 			-- <Precursor>
 		do
 			api.logger.put_information (generator + ".do_get Processing basic auth login", Void)
-			if attached {STRING_32} current_user_name (req) as l_user then
+			if api.user_is_authenticated then
 				if attached {WSF_STRING} req.query_parameter ("destination") as l_uri then
-					 redirect_to (req.absolute_script_url (l_uri.url_encoded_value), res)
+					redirect_to (req.absolute_script_url (l_uri.url_encoded_value), res)
 				else
 					redirect_to (req.absolute_script_url ("/"), res)
 				end