10dac3ee51
When a URL is added to an artist entry, normalize it to a standard form. Artist URLs have both a `url` column and a `normalized_url` column. The `normalized_url` is used for artist finding and the `url` is the raw URL entered by the user. Previously only the `normalized_url` field was normalized; now the URL entered by the user is also converted to a normalized form. This means that if an URL like this is added to an artist entry: * http://www.pixiv.net/member.php?id=1234 * http://www.pixiv.net/en/users/1234 * http://www.twitter.com/DanbooruBot/ * http://mobile.twitter.com/DanbooruBot/ It will get normalized to this: * https://www.pixiv.net/users/1234 * https://twitter.com/DanbooruBot This fixes problems with duplicate URLs being added to artist entries because URLs weren't normalized to a single form.