change $ipv6 value to read from /etc/pihole/setupVars.conf instead of /etc/pihole/.useIPV6

data.php

@@ -1,6 +1,6 @@
 <?php
     $log = array();
-    $ipv6 = file_exists("/etc/pihole/.useIPv6");
+    $ipv6 =  parse_ini_file("/etc/pihole/setupVars.conf")['piholeIPv6'] != "";
     $hosts = file_exists("/etc/hosts") ? file("/etc/hosts") : array();
 
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