Idn warn editors + domain tags in stories if users choose

Setting the domaintags to 2 now shows domain links in stories as well as comments with 3 taking over 2's previous behavior of showing them only for comments. Users will not notice the difference however because the code actually stored undef in the db rather than 2 and that caused it to default to 2 as it now defaults to 3.
This should have a test around it to check if domaintags = 2 else just put in subtext