Define two example ILL strings in en.ini (#3744)

languages/ILSMessages/en.ini

@@ -2,6 +2,8 @@ available_for_pickup_notification = "You have material available for pickup"
 checkout_block = "You cannot check out more items"
 electronic_resources_block = "You cannot access electronic resources"
 hold_wrong_user_institution = "You cannot place holds for material from the requested library."
+ill_item_renewal_limit = "Return by due date (max. renewals reached)."
+ill_renewal_too_soon = "Item will automatically renew (unless requested by others)"
 lost_card = "Your card is reported as lost"
 message_from_library = "You have a message from your library"
 no_change_password_scope = "You are not allowed to change password."