Update isitup.org call to use https to avoid redirect

isitup.php

@@ -42,7 +42,7 @@
 
 # We're just taking the text exactly as it's typed by the user. If it's not a valid domain, isitup.org will respond with a `3`.
 # We want to get the JSON version back (you can also get plain text).
-$url_to_check = "http://isitup.org/".$text.".json";
+$url_to_check = "https://isitup.org/".$text.".json";
 
 # Set up cURL 
 $ch = curl_init($url_to_check);