Removed obsolete calls, harmonized predefine response, added non admin user pages.

When access is denied, also provide when possible and wanted, the needed
permissions so that in the future, user will be able to ask for
permission easily.
Renamed previous user handlers as admin user handlers.
Added non admin user handler /user/{uid} .
Add new `send_...` response to `CMS_API.response_api`, and use them
instead of `create {...RESPONSE}.... ; execute`.
Fixed potential issue with storage mailer initialization if folder does
not exist.
Added utf_8_encoded helpers function on CMS_API interface.
Fixed a few unicode potential issues.
Removed a few obsolete calls.

modules/contact/src/cms_contact_module.e

@@ -123,30 +123,26 @@ feature -- Recaptcha
 
 	recaptcha_secret_key (api: CMS_API): detachable READABLE_STRING_8
 			-- Get recaptcha security key.
-		local
-			utf: UTF_CONVERTER
 		do
 			if attached api.module_configuration (Current, Void) as cfg then
 				if
 					attached cfg.text_item ("recaptcha.secret_key") as l_recaptcha_key and then
 					not l_recaptcha_key.is_empty
 				then
-					Result := utf.utf_32_string_to_utf_8_string_8 (l_recaptcha_key)
+					Result := api.utf_8_encoded (l_recaptcha_key)
 				end
 			end
 		end
 
 	recaptcha_site_key (api: CMS_API): detachable READABLE_STRING_8
 			-- Get recaptcha security key.
-		local
-			utf: UTF_CONVERTER
 		do
 			if attached api.module_configuration (Current, Void) as cfg then
 				if
 					attached cfg.text_item ("recaptcha.site_key") as l_recaptcha_key and then
 					not l_recaptcha_key.is_empty
 				then
-					Result := utf.utf_32_string_to_utf_8_string_8 (l_recaptcha_key)
+					Result := api.utf_8_encoded (l_recaptcha_key)
 				end
 			end
 		end

modules/contact/src/contact_email_service_parameters.e

@@ -13,13 +13,12 @@ feature {NONE} -- Initialization
 
 	make (a_cms_api: CMS_API; a_contact_module: CMS_CONTACT_MODULE)
 		local
-			utf: UTF_CONVERTER
 			l_site_name: READABLE_STRING_8
 			s: detachable READABLE_STRING_32
 			l_contact_email, l_contact_subject: detachable READABLE_STRING_8
 		do
 				-- Use global smtp setting if any, otherwise "localhost"
-			l_site_name := utf.escaped_utf_32_string_to_utf_8_string_8 (a_cms_api.setup.site_name)
+			l_site_name := a_cms_api.utf_8_encoded (a_cms_api.setup.site_name)
 			admin_email := a_cms_api.setup.site_email
 
 			if not admin_email.has ('<') then
@@ -29,11 +28,11 @@ feature {NONE} -- Initialization
 			if attached {CONFIG_READER} a_cms_api.module_configuration (a_contact_module, Void) as cfg then
 				s := cfg.text_item ("email")
 				if s /= Void then
-					l_contact_email := utf.utf_32_string_to_utf_8_string_8 (s)
+					l_contact_email := a_cms_api.utf_8_encoded (s)
 				end
 				s := cfg.text_item ("subject")
 				if s /= Void then
-					l_contact_subject := utf.utf_32_string_to_utf_8_string_8 (s)
+					l_contact_subject := a_cms_api.utf_8_encoded (s)
 				end
 			end
 			if l_contact_email /= Void then

modules/contact/src/persistence/contact_storage_fs.e

@@ -25,7 +25,6 @@ feature -- Change
 	save_contact_message (m: CONTACT_MESSAGE)
 		local
 			s: STRING
-			utf: UTF_CONVERTER
 			now: DATE_TIME
 		do
 			error_handler.reset
@@ -38,7 +37,7 @@ feature -- Change
 			s.append (m.date.out)
 			s.append_character ('%N')
 			s.append ("name=")
-			s.append (utf.utf_32_string_to_utf_8_string_8 (m.username))
+			s.append (api.utf_8_encoded (m.username))
 			s.append_character ('%N')
 
 			if attached m.email as l_email then
@@ -47,7 +46,7 @@ feature -- Change
 				s.append_character ('%N')
 			end
 			s.append ("message=%N")
-			s.append (utf.utf_32_string_to_utf_8_string_8 (m.message))
+			s.append (api.utf_8_encoded (m.message))
 			s.append_character ('%N')
 
 			save_to_file (s, date_to_yyyymmdd_hhmmss_string (now))