Better support for unicode path and values.

Added WSF_REQUEST.percent_encoded_path_info: READABLE_STRING_8
    to keep url encoded path info, as it is useful for specific component

The router is now using WSF_REQUEST.percent_encoded_path_info
    since URI_TEMPLATE are handling URI (and not IRI)
    this fixes an issue with unicode path parameters.

This should not break existing code, and this fixes various unicode related issues related
   to PATH parameter and path info
   but also any component using file names.

(required EiffelStudio >= 7.2)

library/server/wsf/router/wsf_router_mapping.e

@@ -77,12 +77,12 @@ feature -- Status
 
 feature -- Helper
 
-	path_from_request (req: WSF_REQUEST): READABLE_STRING_32
+	path_from_request (req: WSF_REQUEST): READABLE_STRING_8
 			-- Path used by `Current' to check that mapping matches request `req'
 		require
 			req_attached: req /= Void
 		do
-			Result := req.path_info
+			Result := req.percent_encoded_path_info
 		ensure
 			path_from_request_attached: Result /= Void
 		end