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/contact/src/cms_contact_module.e

@@ -20,8 +20,6 @@ inherit
 			contact_api
 		end
 
-	SHARED_HTML_ENCODER
-
 	CMS_HOOK_BLOCK
 
 	CMS_HOOK_BLOCK_HELPER
@@ -287,8 +285,8 @@ feature -- Hooks
 			r.values.force (False, "has_error")
 
 			create vars.make_caseless (5)
-			vars.put (html_encoded (api.setup.site_url), "siteurl")
-			vars.put (html_encoded (api.setup.site_name), "sitename")
+			vars.put (safe_html_encoded (api.setup.site_url), "siteurl")
+			vars.put (safe_html_encoded (api.setup.site_name), "sitename")
 
 			write_debug_log (generator + ".handle_post_contact {Form Parameters:" + form_parameters_as_string (req) + "}")
 			if
@@ -422,17 +420,6 @@ feature {NONE} -- Helpers
 			end
 		end
 
-feature {NONE} -- HTML ENCODING.
-
-	html_encoded (s: detachable READABLE_STRING_GENERAL): STRING_8
-		do
-			if s /= Void then
-				Result := html_encoder.general_encoded_string (s)
-			else
-				create Result.make_empty
-			end
-		end
-
 feature {NONE} -- Contact Message
 
 	template_block_with_values (a_module: CMS_MODULE; a_block_id: READABLE_STRING_8; a_response: CMS_RESPONSE; a_values: STRING_TABLE [ANY]): like template_block